[DUAL GPU SYSTEMS] Performance Issues and Troubleshooting

[elder smelt]

"dual gpu troubleshooting"

[onyx warren]

At this point it's just to get the amount of messages up as high as possible

[elder smelt]

nearly 5k

[onyx warren]

Let's make it full

[elder smelt]

done

🎉

[onyx warren]

Ruined it

[elder smelt]

worry not, lets hit 10k

[onyx warren]

Be not afraid

[mental peak]

Message

We'll get there

[elder smelt]

tbh I should just rename this to dual gpu general or something

the name is the biggest bait

or maybe I convince the mods to make a dual gpu channel

[onyx warren]

That would be elite

[elder smelt]

ok I just send them a screenshot of the messages and we win

👀

[onyx warren]

[plucky crow]

There are reports of better performances in Win10 than Win11. Is that true?

This is related to the fact that Windows 11's multi-core utilization has a rather bad effect on games.

[devout charm]

Bruh

[cedar mango]

Only if the boot drive is not important to you. This will save the current state of the cache into a file and once you boot the PC again, it will reload the cache for you. This will for sure speed up the storage as you will have a cache up to date every time you turn on the PC but it will make the boot a little slower as it needs to reload the cache contents.

You need to enable the "Defer Writes" option, otherwise there is no way PrimoCache can write in the L2 SSD or RAM to save you from the slow HDD

There is no need to do that unless you really know what you're doing. Primo is pretty smart learning your patterns and will save cached written data into the read data portion if it finds out that you've been reading the written data. If you partition you need double the RAM for this to be as effective as in automatic mode (no individual partitioning).

Yes, becasue written data will instantly enter the cache as read data, but in practice you do not need to partition this, let it run automatically, Primo knows what to cache.

Pretty unsafe if it's writing in the precise moment lights goes out. UPS (even the cheapest one) will serve you because you just need seconds to power off the PC in case of a power outage and most UPS these days have USB connection to let windows know how much battery they have.

Select only the drives that have mapped letters in your actual Windows, all the rest can be ignored.

[cedar mango]

Yes, Windows 10 is far better at handling Loseless Scaling, but you loose HDR sadly.

Well I finally tried WGC with Loseless Scaling forcing RTX HDR into it but performance is a miss, Fortnite runs terrible this way for example and it's not the only game. More stuttering and definitely more latency than simply forcing AutoHDR and using Loseless Scaling on top.

Of course I'm talking about Dual GPU.

[elder smelt]

How about reshade hdr?

Its far more supported than rtx hdr

[cedar mango]

I need to try that. But as far as I can see, AutoHDR does a much better job, sadly.

But AutoHDR breaks NVIDIA Reflex and eats 60% of the 2nd GPU as base, so I only have 40% for LSFG.

And reshade is not a true HDR, it simply tries to color the image. I like NVIDIA RTX HDR the best but it has way too many problems in a lot of games.

And for some reason when using RTX HDR + WGC I have way more latency than simply using AutoHDR + DXGI

[elder smelt]

What? Reshade hdr does more than that, its on par with rtx hdr

Its true hdr

If you try it, you will see

[cedar mango]

https://tenor.com/view/wow-surprised-face-little-boss-gif-alisa-gif-15999490334240609303

[elder smelt]

if you want I can send you my config

how many nits is your display?

[cedar mango]

o will try it sir!

800

[cedar mango]

please do!

[elder smelt]

I see my config is for 1000

[cedar mango]

and an easy tutorial

[elder smelt]

I can change it and send it

dont worry

its drag and drop

give me a moment to change the nits to 800

[cedar mango]

https://tenor.com/view/dancing-cat-dance-cat-cat-meme-chinese-cat-gif-7364280193643012451

[elder smelt]

I haven't tested this on other devices so not 100% sure if it works on other systems

if it doesn't work I sent an old one elsewhere and I can send that

just drag and drop the contents of the zip file in the ls folder

thats it

change api to wgc too

also reshade hdr is very customizable, if you think it needs adjustments change the settings

I sent a whole heap of my junk presets too 😅

just use default

lemme do a clean version

@cedar mango

#1308625919157604403 message if my file doesn't work

[plucky crow]

Is the Reshade HDR better than the hdr option offered by the game?

The monitor I use is 1400

Is it recommended that the block size be 128?
I have 32G RAM. I want to make 8G L1.

[elder smelt]

some games yes

not all

[elder smelt]

64 or 128

up to you

64 is what I recommend for l1

[plucky crow]

I will verify your claim with my keen eyes.

[elder smelt]

so at pcie 2 x4 the max fps I can get at 3440x1440 is around 105fps

[mental peak]

@cedar mango when i copy a large file from my hdd to my main ssd? it starts fast as expected (ive moved the file once before to cache it) then it immediately (after about 2 sec) drops and goes back to 120mb/s (hdd speed) and i can't find anything online about it. Any settings i have to turn on/off/change in primocache?

[elder smelt]

sounds like the cache gets used up fully

[plucky crow]

https://www.youtube.com/watch?v=VlNETKI3DtM

My old pc became a monster after switching to the L1 cache using RAM. It's not the pc I used to know.

[onyx warren]

Edging the 1070 I see

[wary wraith]

Could i use this cache app for a single game?

[onyx warren]

You can only select drives/partitions

[wary wraith]

Ahh, ty

[elder smelt]

I can't believe how well its working for people 😄

[plucky crow]

Gone fine stutter, stabilized base fps, improved game loading speed by 3x. Crazy old pc.

[elder smelt]

my eyes my poor eyes 😭

[mental peak]

I'm not sure what's going wrong

[elder smelt]

your whole config is wrong 💀

[mental peak]

Ah

Good to know

[elder smelt]

you don't add every drive and partitions including the efi and fat32 ones

and the restore points too 😭

[mental peak]

Only the ones that have letters right?

[elder smelt]

yes

[onyx warren]

[elder smelt]

your setups are so big lol

mine is quite simple in comparison

[onyx warren]

I just put all my drives in the one task and then my boot drive separately with 2GB lol

[mental peak]

I have lots of things yeah

[elder smelt]

4 drives 💪

i just got a big ol hdd

and with 2 128gb ssds, its all I ever need

fast as an nvme

[mental peak]

I also carry some drives with me, like the HDD somtimes and a portable SSD because I need my work on the go with my macbook

Most of the time they're connected to my PC unless I travel

[elder smelt]

I wonder how that interacts with primocache

like you unplug it while it has read cache on

Definitely don't unplug any during defer write unless you want your data to die

[mental peak]

So I should uncheck the portable ones from the caching process

[mental peak]

Yeah I don't really do that

[elder smelt]

I'd say so, atleast for defer write

I'd just be worried about accidently doing it or something

far too risky with defer write

[mental peak]

The portable drives are also pretty much backups of work in different locations

[plucky crow]

Is this right?

[onyx warren]

I wouldn't activate it if you don't have a UPS

Because if you suddenly lose power it's over for you with this option enabled

Is there a reason sometimes the Cache just doesn't seem to be used?
I'm in-game and I can feel it doesn't use Primocache at all, the Cached Read also isn't going up and the hit rate down

[elder smelt]

weird

should be working fine

then again I barely used l1 cache in the past

[elder smelt]

the bribery worked, we rejoice 🎉

[rain hull]

And I still haven't done a troubleshooting section yet 😭

[elder smelt]

I'm sure you'll make it someday

one day...

[rain hull]

Just gotta get through band solo & ensemble this week (and 3 hours chem homework per day)

[elder smelt]

chemistry homework 🗿

brings back bad memories

[rain hull]

I apologize

At least I got 104% on the unit exam yesterday 😭

[elder smelt]

can't run away from my past 😔

[elder smelt]

how does that even happen

future scientist

[rain hull]

50/50 and a +2 point bonus question

Our teacher started a new unit today by assigning us a shitload of homework due tomorrow and teaching us nothing

I ain't a fan of this class

[elder smelt]

same but math

then there were other classes with no homework and the best teacher

[rain hull]

They literally taught us how to use a chatbot to learn homework material

Like damn, they be getting lazy

[elder smelt]

holy hell

its gotten that bad

[rain hull]

And I still got 2 years left of high-school

Who knows what the fuck class will look like by then

Teachers gonna be using LS on their lectures

Teach 1/20th the material, use x20 generation

[elder smelt]

my school was a disaster near the end ngl

I switched teachers like 3 times and classes 2 times

[dapper surge]

I am currently using both an RTX 5070Ti and an RX6800. When trying to use LSFG in First Descendant, only the RX6800 is being recognized. Even after adjusting Windows settings and reinstalling drivers, the 5070Ti is not being utilized. My motherboard is an MSI X670E Carbon, with the RX6800 installed in the PCI1 slot and the 5070Ti in the PCI2 slot.😭

Is the problem with my configuration or is it an issue with the game?

[clear sundial]

It's a windows and game specific issue unfortunately, and quite common. Have you tried this? https://forums.unrealengine.com/t/how-to-choose-graphics-adaptor-on-startup/332277

Some games ignore that windows setting that you've applied, and you'll have to force it by messing with config files, command arguments or just take the loss.

[dapper surge]

When I configured dual GPUs using NVIDIA cards, there was no problem

I will try what you just told me later. Thank you

[onyx warren]

PrimoCache L1 cache isn't supposed to clear when closing a game right?
It just gets overridden by newer data?

[abstract sand]

Can you just use the 4x option of the new rtx5000 series?

[left cape]

pretty sure you're right, I never see my L1 cache clear by itself

[onyx warren]

Ok good, it just stays at 32mb free once it's filled up

[versed knoll]

Dude's using a second GPU to negate the performance hit, let him be happy

[wary wraith]

what nvidia drivers are good right now? im on 572.42.

[onyx warren]

I don't think there are any "bad" ones atm

[versed knoll]

I just run whatever the nvidia app suggests

[clear sundial]

I've been running single GPU for a few days and today I came back to Veilguard and noticed that some textures weren't loading properly. I was hitting maxed VRAM usage (16GB), even with DLSS performance at 4K + frame generation.

Since my system is running 1.8GB VRAM on idle, using dual GPUs enabled me to use that extra 1.8GB VRAM before without any issues. And people say that 16GB are enough for 4K lol.

When I had my 7900 XTX, even older games were utilizing 17-18GB VRAM, so I'm not that surprised. The good news is that with dual GPUs, this can be mitigated right now, hopefully for a few years more though

[elder smelt]

this^^^

even at ultrawide, I notice idle and game vram usage skyrocket

[regal hamlet]

wth lmao god bless

i always wondered why my ram would just sit at 40% instead of being fully used

[left cape]

heads up, when switching from dual to single (and vice versa) i've occasionally had issues with gpu drivers causing performance hits and crashes
i'm on a dual nvidia setup so this might not apply to everyone!
either way, a clean driver install can't hurt

[rain hull]

New chat for this stuff https://discord.com/channels/1042475930217631784/1344492964298358835

[rain hull]

When running/testing single GPU you can disable the second in Device Manager if need be

[clear sundial]

51W using 68 x 2 4K 100% resolution scale (RX 7600)

I just need to nuke the drivers and install "minimum only" instead of "driver only", because freesync doesn't seem to be working

But I had no black screens or reboots with my RX7600 + 4080. So it seems it was either underpowered PSU or driver specific error for the people that couldn't run RX 7600 with LSFG

@rain hull Sorry for the ping, but I think this might be useful for you. No problems running LSFG on the RX 7600 + another GPU

[rain hull]

Interesting

Mind testing max capability? Also preferably do it in #💾│dual-gpu-setups

[clear sundial]

I could, but my monitor is only 144hz 😅

[rain hull]

Might be able to max it at 4k

[clear sundial]

well, I ran 68 x 2 and it was perfect, using those 60W I mentioned

I might have to update my bios or something, because the bottom slot randomly doesn't detect my GPU

[clear sundial]

I already have the latest bios, I've tried reseating several times, I can't get the 4080 to be detected. I install the 4080 on the top slot and the 7600 on the chipset slot and both cards are working. Either the slot is screwed, or MSI is lying about PCI-E lanes allocation

I'm running 2 PCI-E NVMEs, so that's 8 lanes. I'm running main GPU (top slot) 8 lanes and bottom GPU 8 lanes. That's a total of 24. I can get the system to post with a single GPU on the bottom slot, but not with dual gpus on the CPU slots... It was working fine previously, I don't get it 😞

It also works with GPU top slot (x16) and bottom chipset (x4). It doesn't make sense being lane related. 😵‍💫

[elder smelt]

bifurication and still got scammed 😭

[clear sundial]

I could also be extremely unlucky in having another motherboard with issues... if that would be the case then yikes man

[elder smelt]

Theres no way...

[clear sundial]

and since the 4080 is too chunky, there's no way for me to switch both GPUs (slot wise). I don't even have a smaller GPU with me

[clear sundial]

It's PCI-E Lanes... I've reduced both slots to PCI-E 4.0 x4 and the GPU is detected now

wtf is this scam guys

why the hell can the top slot work at x16 but both cannot run x8?

now it's working again...

my only other theory is bad contact with the slot considering how massive the GPU is

Fuck it, I'm gonna leave my PC on it's side. F these ginormous coolers

[clear sundial]

Fixed by mounting the case sideways. RIP desk space but at least it won't cause issues again

These huge 2.5kg bricks cannot be mounted normally with just 2 screws, even with a gpu support.

and yes, the PCI-E 4.0 x4 (chipset) was dropping frames like my previous system. It can hold 68 x 2 most of the time, but it stutters every now and then

[clear sundial]

0 fps drops now. Perfect.

[clear sundial]

I think my pixel rate theory might be correct and my memory bandwidth theory is not. I think lossless scales a lot more from pixel rate than raw compute.

[wary wraith]

How do i get Gsync to stop giving me stutters? if i disable it in lossless i dont drop frames, when i enable it i drop frames.

[elder smelt]

🪦

would swapping the gpus around provide more bandwidth?

[clear sundial]

I can't do it, the GPU is too heavy, it literally warps itself on that slot up to 2cm with the case on it's side. I'm not gonna risk it with the case upright. With the 7600 it slots normally, since it's a small and light GPU.

This is because it's a normal plastic PCI-E slot.

My motherboard has the top slot being the most reinforced (twice the thickness of the metal), the second PCI-E 4.0 x8 is also reinforced, but with less metal and the bottom PCI-E 4.0 x4 being a normal plastic slot.

I'm not gonna buy a GPU bigger than 2 slot in the future. It's astonishing how dangerous modern GPUs are for the motherboards. My 7900 XTX didn't have these issues since it was a lot lighter than these RTX 4000 cards

[clear sundial]

atm you can't unfortunately. You either have a stable FPS cap, or you're out of luck unfortunately.

The good news is that the new dev log shows an update in regards to that, so that issue could be fixed on the next update

[versed knoll]

Oh I didn't know that

I thought the 7900 XTX was just another chonker for the lot

[clear sundial]

Some models are, like the sapphire nitro+, but mine was the "lowest end" one: Powercolor Hellhound

[vivid zealot]

@clear sundial totally agree. I had a Gigabyte 4080 Gaming OC. It was a great card but want near 4 slots.. I could fit my rx6600 in, so I got a rise cable, bit the only port it would hit was 1x.

I got rid of the 4080 now have a small 2 slot 5080. There isn't much room still, but theu both fit fine and temps are pretty good so airflow must be fine.

The whole sticking a xx90 sized coloer on most non msrp aibs to make them look and cost more premium socks.

It was maybe needing on the 3000 series given their heat but not on the 4000 and 5000 for sure.

[clear sundial]

wow! I wasn't expecting a dual slot cooler for the 5080, pretty interesting. Too bad it costs almost 2k here 😅

But at least that gives me hope for the future models... 👍

[vivid zealot]

Yeah anything that meets nvidia sff compatible spec should be about 2 slot, maybe just over with fans.

Honestly though selling my 4080 got me 85% of the way to a brand new 5080. The used market here is crazy because of the lack of availability/scalping of 5000 series.

As my 4080 was used anyway when I bought it I thought an extra 150 for a new warranty and smaller card was worth it.

[wary wraith]

thanks for letting me know. ive been messing with my setup nonstop trying to figure it out. was gonna install another drive thinking it was my windows

[clear sundial]

Also guys I forgot to mention that after switching to dual GPU again, my VRAM issues disappeared. It seems both Diablo IV and Dragon Age Veilguard require 15-16GB VRAM for max textures at 4K. Using a single GPU with 16GB is not enough, since the OS uses around 2GB in idle.

By using the 7600 as a display GPU, those 2GB VRAM switch to my 7600, leaving all 16GB of my 4080 for the game itself.

This could be important to people having the same issues, by using the CPU igpu to do passthrough, you can negate that consumption of 2GB of VRAM

https://cdn.discordapp.com/attachments/709749783559929891/1345852204531322910/image.png?ex=67c60e0a&is=67c4bc8a&hm=0f86a40edf9781153fb8fbf11bb3f61838bf8bad7ee9e8b641f232377c4140f5&

https://cdn.discordapp.com/attachments/709749783559929891/1345852270750728202/image.png?ex=67c60e1a&is=67c4bc9a&hm=fea8767fd7f12c971396f5b0737a7621c35ead88af85fe00d83caa7454c40a2b&

Those 3GB are from using the desktop with no 3D application running

[cedar mango]

Thank you!!

So I should drop this file to the Loseless Scaling folder?

[elder smelt]

yea or you can copy the ls folder and use that for hdr

2 seperate copies

[cedar mango]

That is correct in all regards. Even for basic output the framebuffer needs to use RAM, when you are using a secondary GPU to do the actual framebuffer, you are freeing the first GPU RAM.

There is also overhead that people forget to mention. Even the basic output of the framebuffer will consume GPU. So for the second GPU you can expect from 15 to 30% of GPU being used just for the output. In case you are wondering, yes, you can get even better framerate on the primary GPU if you are using Loseless Scaling because it's deferring all the framebuffer output to the secondary card.

[elder smelt]

yep

in 3dmark I got slightly higher gpu score compared to single gpu

[cedar mango]

You are deferring all the framebuffer output to the seondary GPU (output) so they are effectively always working in tandem.

[cedar mango]

Do I need to install something for this to work or just copying it will do the trick?

[elder smelt]

copying it

I'm not sure if it will work for you off the bat because its my own config

you might have to make your own

[cedar mango]

I see. But how do I configure LS for this to work?

[elder smelt]

you must use wgc

[cedar mango]

I have it currently to do RTX HDR when in SDR

[elder smelt]

disable rtx hdr too

and have hdr support off

[cedar mango]

It work, right off the bat. And it's less demanding than RTX HDR.

It's 68% GPU against 89%

and I can increase the render resolution up to 70%

[elder smelt]

damn nice

you can customize it alot so do that if you think it isn't that good or something

it should be 800 nits for your display

[cedar mango]

Yes I've adjusted that 🙂

I keep working on reducing the latency

G-sync is a no go, it gives me too much trouble

[elder smelt]

freesync has been weird recently too

not sure why

now it works I think again

[cedar mango]

So far, Reflex applied from RTSS has been the one that gave me the best results

[elder smelt]

thats nice

ingame cap is far superior in terms of latency

but not all games have that

[cedar mango]

Can't wait for the 9070XT reviews tomorrow

[elder smelt]

I can't believe amd feature locked RIS 2

so frustrating

[cedar mango]

Buying a GPU in 2025 is so frustrating...

[elder smelt]

true that

50 series is a hazard and a disaster

used market is decent for some regions

[cedar mango]

It is. It is the worse launch ever for NVIDIA, in fact, worse for any launch that I have memory.

[elder smelt]

nvidia takes the crown once more

5080 lost 10% fps in some situations due to the missing rops

[cedar mango]

Yes I saw the Gamer Nexus video. Steve work is commendable on that front

One thing we do have nowadays is a good community of hardware reviewers and youtubers that document everything.

[elder smelt]

true

I didn't like how the conclusion for the burning connectors was just mostly user error

it was clearly something more than that

[cedar mango]

Well I think Steve know he made a mistake on that and he is pushing harder against NVIDIA

But I've worked with hardware manufacturers a big part of my life because I have a videogames and hardware magazine

and I do know they can be "quite insistent" that you don't tell everything and that you don't be "over critical" else, you loose your "vip" status...

So I do know that Steve was kind of pushed into not say "too much against NVIDIA" on that.

BTW: Did you saw the method for Async and Sync Mode Off on LS ?

Does this method work better than Reflex?

[elder smelt]

not sure which one you mean

[elder smelt]

true but I always thought steve didn't care for all that

atleast hes different now

[cedar mango]

On the forum, it says "How to use Scanline Sync"

[elder smelt]

oh that

I can't use it

rtss doesn't work for ls

for me

[cedar mango]

Did you tried the last version?

[elder smelt]

yea

[cedar mango]

Oh crap!. It does work!

But I still see some tearing, but much lower latency than reflex, mygod.

[elder smelt]

😭

[cedar mango]

I think 1040 for my 4K screen is not right

[elder smelt]

yea

it also depends on fps

[clear sundial]

Wow! That made a lot of sense for me, but I wasn't expecting that kind of performance hit. At most 5-7%. Good to know, thanks 🙂

[cedar mango]

Do any of you can recommend a program that can actually measure latency after LS is active?

[clear sundial]

https://www.osrtt.com/osltt You need hardware for it

Any software only solution is not reliable

[cedar mango]

As I suspected.

Thank you !

[umbral berry]

Can't disable SAM on second GPU with latest drivers...

[wary wraith]

Im not on my AMD build to look and see but you could try ''more clock tool''

https://www.igorslab.de/en/download-area-new-version-of-morepowertool-mpt-and-final-release-of-redbioseditor-rbe/

[humble frigate]

Morning people. i have been encountering an issue with a AMD and a Nvidea gpu. when i resize or change windows my monitor flickers black. i have boiled this down to be a gsync issue or maybe freesync? i dont know. my setup is nvidea is main gpu->amd framegen->monitor. if you just plug my monitor to the nivdea and enable sync everything is fine, but when it goes as the above described setup i have the flicker. i have turned everything freesync and gsync of to make sure nothing messes with the other, but doesnt help.
anyone have this issue or have any ideas?

[versed knoll]

Is your monitor IPS?

[humble frigate]

Oled

[rain hull]

This is an Nvidia issue. Gsync tries to focus on multiple windows at once, causing the monitor refresh rate to go crazy. This causes noticable flickering on VA and OLED panels. I'd recommend setting Gsync to fullscreen only and setting games to windowed mode (assuming you use LS on them)

[umbral berry]

Is adaptive mod runs heavier? My second GPU is utilize %30-35 more on adaptive with same fps as fixed mod.

[onyx warren]

Yes it's heavier

[clear sundial]

I would recommend disabling it in BIOS, it's a gimmick feature nonetheless. It gives "more performance" at the cost of microstuttering. Not worth it imo, even for single GPUs.

[elder smelt]

never experienced that

its a very positive thing for me

[clear sundial]

Diablo iv always stutters with it on, for example

[umbral berry]

Are you sure? I get %5-10 less fps without SAM.

[clear sundial]

Yes, I'm 100% positive. Is 5-10% more fps worth microstuttering or random hitching? For me it sure isn't

[humble frigate]

but i cant even control gsync since my monitor is plugged in to the AMD card. you saying it still applies even though i cant control it?

[rain hull]

Oh. I hadn't realized that you're on dual cards

[rain hull]

I'm not sure how it behaves on AMD, but you can try the same thing, just for Freesync

[gloomy steeple]

Hello all, I'm planning to buy a console (onexplayer G1) with Oculink and USB 4 and connect 2 egpu's, one will run the game and the other lossles scaling. Can you tell me how well this crazy idea will work?
Can it damage anything (connectors, bridges or even BURN UP THE WHOLE DAMN THING)?

P.s, if you are interested, I plan to use ADT-Link UT3G and TH3P4GaN V2 raisers

[coral olive]

From my experience dual GPU goes like this:

System: 5800X3D + RTX 4090 + Titan Xp. Motherboard with Pcie gen 3, both GPUs on x8 slot direct to CPU (mobo suport single pcie x16 or dual x8/x8 because of pcie switches - asus x370 prime pro).

Newest Win11 and drivers.

With Titan Xp as Game GPU and 4090 as LSFG Gpu - no issues.

With 4090 as Game GPU and Titan Xp as LSFG Gpu I face the issue when the Titan load goes closer and closer to 100% then it starts to bottleneck the 4090 performance. What I mean - Lets say that 4090 can run game at 60 FPS 1440p then Titan produces 120 Fps at x2 gen with no issue. But if 4090 runs game at 90 FPS then Titan goes to 85% load, can not keep up with x2 frame gen and causes the 4090 to bottleneck and render game at only (for example) 80 fps,

I know other people do no face the issue. In case of no issues, if the gaming GPU can produce 200 fps and LSFG Gpu produce only 300 frames (despite set to x2 mode - should be 400) the gaming GPU still pushes 200 FPS just the LSFG can not keep up so we "see" 300 fps pushed to display instead of 400.
In my case, if the LSFG gpu starts to be overwhelmed then the gaming GPU will slow down.

Simply speaking: Game 1: Gaming Gpu 99% load 50 fps, LSFG x2 GPU 40% load = 100 FPS
Game 2: gaming Gpu 80% load 80 fps , LSFG x2 Gpu 90% load = 160 FPS on screen. After disabling LSFG gaming GPU goes to 99% load and 100 FPS (just example).
It seems like there is a "vsync" between gaming and lsfg gpu, if the lsft gpu starts to approach its performance limit then it forces the gaming gpu to slow down.

From other people experience I know this is not the case, and normally the gaming GPU should always run at 99% even if the LSFG gpu is too weak and might even generate less fps than the gaming gpu can render. But I also know a few people were describing this scenario that I face.

No CPU bottleneck in case, just to note that.

[snow sparrow]

I don't know what game u're running but 5800x3d on this system is definitely a bottleneck, check ur cpu threads to see if any are capped and you just don't see it because u assume 30% cpu usage is fine, while one of ur threads is capped out.

[coral olive]

No no, trust me, I know when the 4090 is bottlenecked by my 5800X3D. As I mentioned, the issue is without LSFG enabled 4090 can be pushed to limit, but when the LSFG is enabled and the LSFG gpu is too slow, then it starts to slow down 4090 also. This is the strange part.

[snow sparrow]

Could be PCIe bandwidth limitation under load of both gpus, either that or power limitation, try to track those

[coral olive]

Yes, I was thinking about the pcie limit, that is why I got the mobo with x8/x8 direct to cpu. But if I go with x4 gen 2 via chipset or x8 direct to cpu (on LSFG gpu) the result is similar. May be that even x8 gen 3 is not enough, but I have no way to switch to newer hardware with x8/x8 gen 4 or gen 5 for now (pascal does not even support gen 4, but anyway).

[snow sparrow]

x8 gen 3.0 is a bottleneck to 4090 thats first of all, sharing that lane with another gpu might be too much, and thats without power limitations or other bottlenecks that might exist

like 5800x3d being a bottleneck

unless u exclusively play at 4k...

[quasi reef]

Anyone able to solve the issue where windows wont swtich to dual gpu mode? I have 2 cables connected to 1 monitor, 1 for the single 4090, the other for the 4070ti super (dual gpu setup) and the monitor is hellbent on only using the 4090 output, even tho it is detecting the 4070ti as well as another monitor.

I can get it working sometimes, but it is difficult and it just refuses no matter what i do, extend or duplicate it will keep using the single 4090 connected to DP

[coral olive]

I think you will have to set display only to 4070 or 4090 dependinh what gpu you want to use

[quasi reef]

this solved the issue, windows display manager was useless

[regal hamlet]

gen 3.0 x8 is enough, im running that currently

it might be related to power, whats your psu?

i have 800w so no issue htere

maybe the hdmi cable isnt fast enough?? or faulty

[rain hull]

What res?

3.0 x8 or 4.0 x4 evidently struggles a lot for 4k HDR

If you're at a lower res I'm not sure

[tired quest]

you need a expensive motherboard to run PCIe bifurcation (4.0 x8 x8) to run a decent 4k

[quasi reef]

4k 120 in some scenarios is not possible with 4.0 x4

talking about 120 base fps, not generated fps

some games are hard locked to 100 fps, some to low 200 fps, i havent really found what is the cause besides being HDR

[quasi reef]

1440p should be no problem

unless we talking about 1440p +360hz

[rain hull]

Bifurcation is supported on a ton of old and cheap mobos nowadays, it's just the ability to split one slot into two with an adapter.

But actually having two slots that run at x8 isn't common in budget boards

[clear sundial]

back to dual GPU, hopefully it's the last time I have to switch motherboards...

DOCP / XMP isn't stable though, so 4800MHz RAM it is 🤷

[elder smelt]

oh what happened with your system?

[clear sundial]

the 4080 broke my second PCI-E slot

and I got the MSI reply today, warranty refused (as expected). So I'll have to sell it as working, but with a defective secondary PCI-E slot

The 4080 itself, I'm currently fighting the store and will probably take it to court to get my refund. The TL:DR is, DON'T use big GPUs, even with GPU supports, it will destroy your PCI-E slot sooner or later

[elder smelt]

jesus that is beyond awful

[clear sundial]

That's the treatment that you get by paying 450€ for a motherboard

[elder smelt]

$450 wtf

is this america?

[clear sundial]

Europe

[elder smelt]

no consumer stuff?

[clear sundial]

23% VAT ftw

[elder smelt]

man wtf

[clear sundial]

The thing is, the GPU itself, I can fight it to get my money back. The motherboard I can't, since how can I prove that I didn't destroy the slot myself?

[elder smelt]

well it was being used as it should and it broke in that process

I doubt any store here would refuse to refund or replace

but its aus

so accc (australian consumer laws)

[clear sundial]

But looking at the pics, it shows physical damage. So they can 100% defend themselves by saying "bad mount". In the case of the GPU, since it doesn't show physical damage, they can't do squat

[elder smelt]

what bs

[clear sundial]

yup... I just want to share this, because dual GPUs will make this happen, since the primary slot is a lot more reinforced than the secondary slot

The only "fix" is running 2 slot GPUs, since those won't ever break slots

[elder smelt]

heavy cards are so unnecessary

but I think the mobo I ordered has both slots reinforced anyways

and its pcie 4 x8 x8

so it should do alright

still wild to see how warranties can be denied like that

btw what mobo did you get this time?

[clear sundial]

That's not enough unfortunately, my motherboard had that slot reinforced, albeit not as reinforced as the primary slot

[clear sundial]

I got a refurbished Asus X670E Crosshair Hero, but this time I bought it with insurance for "accidental damage". I'm never buying motherboards without insurance anymore

But, unfortunately, cannot run DOCP / XMP stable. I have to run it at 4800MHz 😦 but oh well, should be enough for 60 base fps

[clear sundial]

you are 100% correct. I'm currently running this GPU https://www.inno3d.com/product/inno3d-geforce-rtx-5070-ti-x3-oc and it runs 66ºC at 35% fan speed at 300W. It's so compact and more than enough

[elder smelt]

insurance for mobos damn

hopefully you got it at a decent price

[clear sundial]

not gonna take risks anymore. The horrible quality of them nowadays has screwed me too much

[clear sundial]

same price as the MSI one

with insurance included

[elder smelt]

oh rip

well its very high end so if nothing breaks you should be good

[clear sundial]

yeah, hopefully for real this time, I'm so tired of RMAs and things breaking...

I've had more RMAs the last 8 months than my entire life

[elder smelt]

insanely unlucky

[coral olive]

corsair hx1500i so power is not a problem

[coral olive]

1440p

[coral olive]

yes, having two pcie slots connect to CPU was somewhat popular back when, my Z77-GD55 was middle teir mobo and had this, now only top tier support that

[main hazel]

Is anyone here using a 6600/6600XT (or something similar) with a a PCIe 3 x4? Is there a problem when it comes to dual gpu setups? Pc pack picker throws an error cause the physical PCle of my motherboard is x16 but the real one is x4

(Assume reversed, don’t know how to change it)

[clear sundial]

I don't recommend it. PCI-E 3.0 x4 is extremely slow. If that's from the chipset, then it's even worse

Minimum PCI-E 4.0 x4.

[topaz sand]

Hi everyone, I recently got a 5500 XT to use in dual setup with my 3080 TI but I feel that the games are stuttering and not really that smooth while using LS. I have a Ryzen 9 3900X and X570 AORUS ELITE, I followed the dual gpu tutorial here on discord.

[topaz sand]

I'm using the 3080 TI for rendering and the 5500 XT for LS, even with LS not running the 5500 XT is at 60% of utilization

[cedar mango]

Agreed. With my setup (4060 for LSFG) I get max of 195 FPS with PCIe 4.0 at 4x

[cedar mango]

You are using AutoHDR?. AutoHDR is resource intensive and uses the GPU to generate HDR from an SDR source. That's why you see a 60% GPU utilization on the LSFG GPU.

[topaz sand]

looks like auto hdr was the problem, now I have around 30% utilization on the second gpu with lossless not running and 80% when running, and the main gpu (3080 ti) is not losing usage anymore while lossless is running, thanks a lot!

[elder smelt]

so was it a pcie bandwidth issue?

I don't recall autohdr being that intensive

[cedar mango]

No, it's not a pcie bandwidth issue and it is not a problem. It is by design. AutoHDR uses GPU processing to convert from SDR -> HDR and that is taken from the GPU that does the framebuffer (it needs the framebuffer)

That is why whenever you enable AutoHDR you are using about 60% of the LSFG GPUs to process HDR. Leaving only 40% for the FG itself. On AutoHDR games, I lower my Flowrate percentage to 25% to compensate. When games are working at native HDR, usage goes down to 30% and you can increase Flowrate to 100% without issues.

This is expected behavior. There is no way to lower the GPU usage below 30% because that is by design, the second GPU needs to process the framebuffer and that output operation takes resources.

The 2nd GPU will always be processing AutoHDR and RTX HDR so please consider that extra load when selecting the 2nd GPU.

[elder smelt]

but autohdr isn't that intensive

unless you mean the reshade addons

[cedar mango]

Well, no for a very good GPU. But for a 4060 it is.

I mean AutoHDR from Microsoft.

[elder smelt]

huh didn't know

at that point rtx hdr and reshade hdr are superior in terms of gpu usage 😅

[cedar mango]

Reshade is not doing real HDR, it's doing an aproximation within the HDR space to convert the values. AutoHDR does real HDR aproximation.

It depends. If the 2nd GPU is strong in Tensor cores, RTX HDR is a better option.

One good thing about RTX HDR compared to AutoHDR is that RTX HDR will eat GPU resources from the tensor cores, which are completely not-utilized during framebuffer operations.

[elder smelt]

true

it still takes a hit though

[cedar mango]

So, better spread of actual GPU allocation.

Yes, it takes a hit.

Converting SDR to HDR in realtime is not as "friendly" as people will think it is.

[elder smelt]

for sure

[cedar mango]

I was forced for example to send the RTX HDR to the primary GPU when doing video output for my music videos with MPC-BE because it happened to be "too much" for my 4060 to do Framebuffer + RTX-HDR + NVDec + LSFG.

[elder smelt]

damn

[cedar mango]

So I changed the order and forced my main card to do NVDec and that fixed it.

[elder smelt]

I'll definitely try to offset some stuff from my main gpu to my secondary when I build my new system

[cedar mango]

Yep. This program allows you to do so many combinations.

[elder smelt]

maybe a 6600xt can do that

6600xt doing reshade hdr + lsfg

definitely need to lower res scale for that though 😅

[cedar mango]

Yes.

I am considering on upgrading my 4060 to something like a 4070 in the future, to compensate for AutoHDR as I have lots of games that uses AutoHDR and I like that the most.

Or probably that new 5060, if it ever goes into a normal price.

[elder smelt]

imo if you already have a 4060, you should take an even bigger increase of performance than a 4070

[elder smelt]

yea sounds good if the performance is good

[topaz sand]

it is possible that some games are using the second gpu tho? I started a game on Battlefield 2042 and I have 90% usage with the primary gpu and 70% with the second one without using lossless

[cedar mango]

No that's not possible unless you have Physx on that game and NVIDIA is selecting your second GPU for Physx. What is possible though is that you may have an incorrect HDR configuration and that is affecting the output. To diagnose a possible HDR issue, simply switch your resolution to standard SDR and try the game, without LS. If the load on your second GPU goes doen to 30% (the expected behavior) then you'll know you have a problem in the HDR output resolution.

Another possible outcome of having a 90% GPU usage on 2nd GPU without FG is that your PCIe bus is lower than PCIe 4.0 at 4X.

[elder smelt]

battlefield 2042 seems to have an issue where it uses the display gpu from what I remember

one of the few games that do that

[cedar mango]

In that case yes, of course

[elder smelt]

not sure if anyone found a fix

[cedar mango]

But you can still force it

just type "graphics"

[elder smelt]

nah that didn't work

I forgot who had the issue

[elder smelt]

pretty sure it didn't do a thing

[cedar mango]

Select the App manually (go and click on your Battlefield EXE file)

And force your main GPU

That should force it.

[elder smelt]

https://discord.com/channels/1042475930217631784/1338730927546695700

[cedar mango]

And your second GPU will lower down to 30%

[elder smelt]

I don't think the person ever found a fix

not sure

[topaz sand]

yeah some people are complaining about the same thing for what I'm reading on Reddit, manually changing to use the main one from windows doesn't help :/

[cedar mango]

crap 😦

That engine was always conflicting.

[elder smelt]

rip

[topaz sand]

but I'm doing some tests and the main gpu is at 90% usage while the second one is at 70%, if BF is using the gpu connected to the monitor the main one should be much lower in usage or not?

[elder smelt]

it should

is it using main gpu?

can you max out graphics and resolution till you get bottlenecked?

if the main gpu usage maxes out then its using your render card properly

[cedar mango]

I'm begining to suspect is doing something weird with the HDR output. Please run the test I gave you. Switch to standard SDR and check if the 2nd GPU utilization lowers to 30%

I know for a fact if the HDR output is done improperly, it will severely cripple the 2nd GPU utilization.

[topaz sand]

yeah with sdr the second gpu has 40% utilization while the main one is around 80/90%

[cedar mango]

What GPU you have as 2nd?

Your GPUs are being used correctly. The problem lies in the game itself and how it deals with HDR

[elder smelt]

oh so its working fine for your system

thats very good to hear

[elder smelt]

jeez so many hdr related issues recently

[topaz sand]

5500 XT as second gpu and 3080 TI as main one

I have an X570 AORUS ELITE as mobo, it should have 4.0 x4 on both PCIe

[elder smelt]

what resolution?

[topaz sand]

1440p

[cedar mango]

Then 40% is expected result.

For a 5500XT it's expected to have an about 40% GPU usage for framebuffer with correct SDR or HDR output.

If you say you have an 5070 and you have 40% GPU usage for framebuffer I would say something is very wrong.

[topaz sand]

I see, it means I will play BF withous lossless then 😄
Thanks a lot for the help!

[versed knoll]

I run a 6600M on pcie 3.0 x4

It's been working pretty well for me

I assume because I'm not trying something crazy like 4k hdr 240 hz

(I'm running 1440p 165hz HDR)

And it's been pretty much flawless on my AMD card

Unless you want a crazy high resolution + framerate, pcie 3.0 x4 shouldn't be that huge of an issue

[versed knoll]

I use a Prime B550 Plus AC HES and the chipset slot has yet to give me trouble just for being a chipset slot

[elder smelt]

and then theres me with pcie 3 x8 having issues

I really wonder if pcie 4 x8 would fix it

[rain hull]

I'd make sure that your 5500xt's slot is running at PCIe 4.0 x4. I have an X570 board and needed to lower the top slot to 3.0 x8 for the bottom slot to be 4.0 x4 (instead of 3.0 x4)

[topaz sand]

yep GPU-Z says that it's running at PCIe x8 4.0

[versed knoll]

If I were you I would feel scammed after that

[rain hull]

Tbh it doesn't mean much of anything with an Arc B570 as a secondary

Since it needs to be in the top slot

[topaz sand]

guys stupid question, do I need the drivers of both gpu installed? I have nvidia as primary gpu and AMD as secondary gpu

[onyx warren]

Yep

Otherwise the car(d) is gonna drive by itself and crash (into the next wall)

[topaz sand]

yeah all my games are crashing after a while of playing, I wonder if I have to disable the Hardware-Accelerated GPU Scheduling too?

[versed knoll]

HAGS has been shown to cause issues for a bunch of people

[mental peak]

Strange, i juste checked GPU z and it says my 4060 (ls card) is running at pcie x8 4.0, so far that's normal, but the I check my 4070 (card for graphics) and apparently it's running on x4 4.0 and not x8 4.0, but my motherboard supports dual x8. Did I miss something in my BIOS maybe?

[elder smelt]

might be lowering its speeds at idle

[mental peak]

im not super well versed on what this manual is saying. Does it mean that because i have 3 ssds connceted, my pcie bandwith is reduced ?

[mental peak]

gonna launch helldivers 2 and check

[elder smelt]

I don't think so but it doesn't really specify

[ivory moon]

Specs only say that when you have pcei ssd connected to m.2_3 slot, it will disable this sata port:

[mental peak]

Yeah it's still says it's running at x4 4.0

[elder smelt]

rip

check bios

[mental peak]

What about the table showing m.2_2 using x4

It looks like using an SSD in the m.2_2 uses a x4 lane causing the second pcie to go to x4 instead of x8?

And I do have every SSD slot being used

[ivory moon]

oh yea idk why I ignored that.. You are propably screwed.
If your mobo suports usb-c, you can buy nvme enclosure with usb-c and use that.
For games its fast enough.

[mental peak]

Lol I already use one of those as well

[ivory moon]

Get a NAS then. Main rig is not a good place to store 16tb of data xD

[mental peak]

I do backups on a separate HDD

[ivory moon]

pciex16_3 is not an option for that second ssd ? There are cards for that. But IDK your mobo will do with lanes splitting, as its not in the table

[mental peak]

I'm probably gonna get rid of my SSD in slot m.2_3 and put the one in m.2_2 into that the m.2_3. It should theoretically get rid of the lane splitting.
But before I do that, if I switch an SSD to another slot on the motherboard, do I losing risk anything?

[ivory moon]

Its as safe as it gets~

[mental peak]

Alright I removed the extra ssd that was using pcie bandwidth and it worked

I guess you can add that to the dual GPU setup compendium of stuff to watch out for

[elder smelt]

great

now you get full performance

[onyx warren]

And less storage

[mental peak]

That ssd was for primocache but I can do without, I'd rather have more PCIe bandwidth

[proven hedge]

this is good enough?

fuck i think i can't do it with this system 😭

[onyx warren]

Depends on resolution and refresh rate I guess

[topaz sand]

I'm crashing a lot since I got the dual gpu setup, even without using lossless. I tried everything and I did a refresh windows 11 install too but my games are still crashing every time. Watching the errors I'm getting inside the Event Viewer it's always something related to NVidia or AMD, like an exe file from the NVidia SDK FrameView or a certificate protocol from AMD.
It is possible that the NVidia and AMD drivers are conflicting? Do I have to install them in a "particular" way? For example only installing the drivers without the interfaces like the NVidia App and Adrenalin?

[ivory moon]

I would clean DDU the drivers, and install only the control panels.
As you said, no NvidiaApp and such.
Maybe update bios. (only if ur mobo has back flash available, so there is no possibility of bricking your PC).

Since I am not playing online games.. im thinking about OS hypervisor.
Unraid supports multiple GPU per VM instance,. and I am really familiar with unraid, but there are alternatives.. such as VMware and such

You can take your OS install and just try it inside such hypervisor.. not even hard to setup.
It could be great for multi GPU setups, but I don't own 2nd GPU right now, waiting on some super deal, as I am in no rush to buy one.

[topaz sand]

still no luck, games are crashing or pc reboot after playing for a while 😦

this is the error I'm getting:

Initialization of SCEP certificate enrollment for WORKGROUP\DESKTOP-F7IVP8H$ via https://AMD-KeyId-907d65e9b562315997dd5ad086b2b7598957b92c.microsoftaik.azure.net/templates/Aik/scep failed:

GetCACaps
GetCACaps: Not Found

json
Copia
Modifica
{"Message":"The authority "amd-keyid-907d65e9b562315997dd5ad086b2b7598957b92c.microsoftaik.azure.net" does not exist."}
HTTP/1.1 404 Not Found
Date: Sun, 16 Mar 2025 14:06:26 GMT
Content-Length: 121
Content-Type: application/json; charset=utf-8
X-Content-Type-Options: nosniff
Strict-Transport-Security: max-age=31536000;includeSubDomains
x-ms-request-id: c633bbc2-840c-4089-ad24-02ead5bb91e2

Method: GET (234ms)
Stage: GetCACaps
Not Found (404). 0x80190194 (-2145844844 HTTP_E_STATUS_NOT_FOUND)

[ivory moon]

yea there is nothing on that url

your chipset driver is outdated, and its configured in such a way that it throws bluescreen driver error when it cannot find certificate hosted on URL which is configured in chipset driver.

try to install newest chipset driver you can.

weird this can actually cause BSOD.
As driver is already installed.

My friend does not need his 7600 non xt, so I will be able to borrow it and eventually buy it if I find dual gpu setup usable with my current configuration.

I will then post performance results for archival purposes.

[topaz sand]

oh I see, I'll try updating and see if it still crash, thanks!

[topaz sand]

nope still crashing... same error

I'm reading on internet that can be something related with TPM

[ivory moon]

gpt is your friend, if you paste that error message in chat, then ask how to disable such check, it could potentially give you instruction how to disable invalid driver attestation checks.

Not really reccomending that, but you get crashes cuz of bad drivers, so...

[topaz sand]

it's 2 or 3 days that I'm chatting with gpt about all these errors 🤣 but no luck so far
now he's suggesting to disable TPM from the bios

[tall moat]

How is the 6650XT with you for 4k

Is it same as 6600XT

What is your targeted frames

[versed knoll]

What's your target resolution, framerate and second graphics card you wanna use?

I run pcie 3.0 x4 just fine

[proven hedge]

I tried using a 1070 and 2060 as render. I gave up because everything i did didnt seem good enough. Maybe it has something to do with my ASUS swift monitor, cause 60fps on it feels like 80, but whenever i use LSFG it looks more choppy. I have no clue, i will maybe try it later again, now im tired of pulling out GPUs lol.

Target resolution was from 1080p to 1440p. 30-40fps base seemed good with 2x, but I want more. I have a 240hz monitor

@versed knoll

What are your settings?

How much fps can you reach

[versed knoll]

At 1440p I can reach 115/230

with 100% flow scale, fixed mode

Using an RX 6600M

[proven hedge]

Ok. I just need better gpus then.

Im getting a 3080 now in a few days. I can try it again. But are you frames smooth? Does it feel like 200fps?

@versed knoll

[versed knoll]

My monitor is 1440p 165hz but even when doing 82/164 it feels really nice

The timegraph doesn't get altered when I enabled LSFG

[left cape]

all battlefield titles gave me this issue.
taking my render gpu out of my x16 slot and putting it in the x4 pcie slot fixed the issue, works as intended now for every game i throw at it

sorry havent read this chat in a minute

also before doing this, check to see if you have a "primary gpu" settting in your bios and play around with that

unfortunately i don't have this setting, so physically swapping pcie slots was my only option

[left cape]

10 series dont put out enough juice unfortunately, upgraded my 1070 to a 3060ti with a 4070 as my main render. works great

input latency is noticeable if you're pretty sensitive to that, but itd only matter in highly competitive games.

[tall moat]

My main gpu is not rendering the game

[cedar mango]

That depends on your setup.

[proven hedge]

now i have 2 gpus inside my system. when i launch a game, both of them are being used without any software. Is that normal? feels like im running sli without any SLI adapter

shouldt gpu1 be inactive since im not running it on the DisplayPort nor LSFG?

[cedar mango]

Yes it's normal. The output to screen GPU (framebuffer composing) will use GPU

So if you are rendering on the main GPU and outputting on the 2nd, that second GPU is working in 2 tasks (even without using LS)

• receiving frames from the main GPU through the PCIe bus.
• composing those frames in the frambuffer for output.

That should account for about 30% GPU usage.

[proven hedge]

well, after changing some settings, i now have it to 0 usage on seconday card

but you mean that this is wrong? It will be alot of strain on the PCIE lanes?

i have to test first before i comment, haha

[cedar mango]

I find it almost impossible to have 0% GPU utilization on the output GPU

The output GPU must receive frames from the render GPU

That process in itself uses GPU.

[proven hedge]

yup. its wrong. i still get same numbers on FPS on render and LSFG

i must say i connected the DisplayPort to the main GPU. Which is called RENDER GPU in this forum?

[cedar mango]

Yes

[proven hedge]

but ok, if its normal i must try. I just tought the secondary GPU should be at 0 when not being used

[cedar mango]

That is not the way to do it

[proven hedge]

ok, i heard someone else say it fixed their problem so i tried

[cedar mango]

If you do that you are doing a 2-way transfer from Primary to Secondary when LS is ON

it will resuilt in a catastrophe of stuttering and bad output

The output must be connected always to the secondary GPU (the one that will do LSFG).

And I mean always.

[proven hedge]

ok, i will try one more time, see what happens :)

[cedar mango]

The whole point is that frames will only travel from primary to secondary and then LSFG will compose the final output right there.

Any other way you try will work terribly bad.

When you connect output to the second GPU you will also free the primary GPU from creating the output, which will save you about 2GB of extra memory.

Well about 2GB of memory on a 4K display that is.

If you watch the memory consumption on both GPUs you'll see that you will use about 2GB on the second GPU all the time while outputting the screen (even without using LS).

[proven hedge]

ahhhh, okay. thats how it works. but maybe all motherboards arent designed for this, as i still have problems after following guides on the internet. but i will try this first again.

so that means you have to have a beefy secondary card anyway, as it will always consume usage even when not LSFG is on

LOL my bad. i set the LSFG at 1x frame gen.. that why it wasn't working.

ok, the usage is very high. I have to use upscaler too in 1080 -> 1440

[cedar mango]

Not that beefy.

[proven hedge]

what do you use?

but my secondary is at 90%, i have to use upscaling

do you also do that?

Thanks for clearing things up

cool, im at 240 fps now :D

so yes it works. but only with upscaler

if i want to keep the frame gen below 2x

[cobalt moat]

I use the 64 EU integrated GPU on my laptop to provide frame interpolation for the 4060. I found that there is performance degradation. For example, in MHW, without frame interpolation, it can achieve over 50 fps, but after enabling frame interpolation, it drops to around 45 fps. Usually, this card can add about 140 frames per second at 1080p.Theoretically, with dual GPUs, frame interpolation shouldn't cause performance degradation, right?

[cedar mango]

Using dual GPU's cause 0 performance degradation on the render GPU. On top of it, it will give you an extra of about 1.5 to 2GB of VRAM on the render GPU product of having the output screen on the FG GPU.

[cursive oak]

i was about to post here because i had religiously followed guides to use dual gpu and no matter what i did it had enormous performance issues
then i opened gpu z and found out my frame gen gpu was running on ONE pcie lane

[cobalt moat]

I found out the reason. The GPU selection in "ls" is reversed. To use the integrated graphics for frame interpolation with the output from the integrated GPU, I need to select my discrete GPU. So before, I was only doing single-GPU frame interpolation. Dual-GPU frame interpolation really doesn't have a performance loss...

[onyx warren]

With how often this happens wtf is Windows doing

[rain hull]

I've only had LS flip them when I switch my monitor from one to the other without restarting the app. Closing and reopening it afterward fixes it for me

[versed knoll]

Sounds like a registry error

[vivid zealot]

.

[solar scarab]

I have an A750 as my framegen GPU in a 3.0 x4 pcie, 1440p resolution, the max framerate (native, without lossless) is 64. Is this normal for pcie 3.0 x4?

[rain hull]

This is exactly what happened to be when I ran my B570 in a 3.0 X4 slot. Evidently Arc cards don't function properly when given 4 lanes

Putting it in a slot that runs at x8 (even 1.0 x8 or 2.0 x8) resulted in it working properly

[cedar mango]

Sadly yes.

You need at least PCIe 4.0 X4 If you are on PCIe 3.0 you need at least 8X

[rain hull]

No, PCIe 4.0 x4 still likely won't function properly, it needs 8 physical lanes regardless of PCIe version

It's not normal, especially at 1440p. 3.0 x4 has the bandwidth to transfer some 220fps at 1440p SDR

It's specific to Arc cards and I had it happen on my system with a B570, which I chose to move to the top slot for 8 lanes

[topaz sand]

can someone help me understand if these PCIe settings are okay? I'm very dumb a these stuff. 3080 TI for rendering and 5500 XT dedicated to Lossless

[onyx warren]

Click the question mark button and see if the 3080 Ti goes to x16 4.0

Otherwise yes, except if you want to do 4K HDR

[topaz sand]

it says this, I'm playing at 1440p hdr

[onyx warren]

.

[topaz sand]

Oh yes, sorry, I misunderstood, it does go to x16 4.0

[onyx warren]

Then it should be fine. Although high refresh rate 1440p HDR could also cause a bottleneck

[topaz sand]

I've been experiencing a lot of crashes in a lot of games lately, so I'm trying to understand what it could be.

[onyx warren]

Crashes can be drivers

A PCIe bandwidth limitation shouldn't cause crashes

[topaz sand]

looks like that, I always get an error about AMD drivers or something

[topaz sand]

this

but the error changes almost every time, while playing BF2042 I get a "graphic card physically removed" error, on Dying Light 2 something else

[onyx warren]

Maybe reslot the card

[rain hull]

Do a DDU and reinstall drivers for both the AMD and Nvidia GPU: https://www.youtube.com/watch?v=98DAgw1KcmI

[topaz sand]

Already did that a couple of times. I'm thinking of two options, the 3080 TI is getting too hot even if it's not reaching 90° but something like 88° because the 5500 XT is blocking the air flow, or my PSU is at its limit as I have an 850 w, but in this case it's strange because I crash in games like Battlefield where I don't use Lossless and the 5500 XT would be at 30% of utilization, and in other games like Snowrunner I'm not crashing even with both GPUs running

[half creek]

Is this performance from my system normal? PCIE 4.0x16 primary + PCIE 4.0x4 secondary (connected to the display)

[rain hull]

Seems to be, HDR uses way more bandwidth

[cedar mango]

194 FPS seems to be the maximum I can get with full HDR 10-bit on my 4060 at PCIe 4.0 4X

[solar owl]

I have a question about if in a dual GPU environment (connecting all monitor terminals to the sub-GPU), if I play a game without using LSFG.

Running Timespy in such a dual environment will definitely result in lower scores compared to a single GPU.
But I was wondering if there is any actual game frame (avg, low) difference.

[rain hull]

Resolution?

[cedar mango]

4K

[rocky nebula]

do I have to connect the display to the gpu running ls?

lsfg

[onyx warren]

Read the guide

?dual

[glass horizon]

#1323391346039455756 message

[upper cobalt]

Windows version: Windows 11 24H2
Driver(s) version: 572.83 with 25.3.2 and 566.36 with 24.12.1
GPUs used: RTX 3080 and RX 6500 XT
Platform information (CPU+Mobo): Ryzen 5600X with Asus ROG Strix B550-A Gaming. Also i have 2xNVME PCI3 and 2xSSD if it is matters.
How monitors are connected and used: 2 Monitors 3440x1440 144hz and 1920x1080 60hz
Any anomalies: When I start a game without LS, the 6500 XT runs at 99% while the 3080 stays at around 20–30%, and the FPS is terrible. I’ve tried many things, but nothing worked. However, when I plug my monitors into the 3080, then the 3080 runs fine.

[versed knoll]

You didn't mention refresh rate

But your RX 6500 XT is getting stretched by two monitors, splitting its pcie limited maximum potential

Are you running your game on both monitors?

Extra monitors cripple a second LSFG GPU very easily

[upper cobalt]

Thanks for your reply. My main monitor is 144Hz and the secondary one is 60Hz. It probably depends on the game, in the two games I tested first (Rocket League and Death Stranding), no matter what I do, the result was the same. I tested two more games after that (South of Midnight and Alan Wake 2), and they worked well, especially Alan Wake 2, which ran perfectly. Since it ran so well in those two games, I’m not sure if the issue is with my hardware, or if it’s something specific to each game or maybe even Windows itself.

[devout charm]

just realized my second X16 slot is a pcie 2.0 spec one that run at max x4 link... what a garbage motherboard...
Asus tuf b450 plus

there is basically only ONE pcie slot that run at 3.0 spec + the nvme that i use

all the other are at 2.0 speed

[onyx warren]

That's tuf

[devout charm]

it's actually crazy how the b550 version is WAAAY better

b450 vs b550

[junior plaza]

Why does second gpu need a monitor connected? I am confused

[onyx warren]

It's explained in the dual guide

Basically so frames only have to travel through PCIe once instead of twice, reducing latency and improving performance

[junior plaza]

there is nothing plugged into my second gpu and it doesnt work at all with LSFG

[onyx warren]

Well you should connect your monitors to it, as already said

[junior plaza]

but my primary gpu is stronger 😭

[onyx warren]

Yeah

Doesn't matter

Have you read the guide?

Because you don't seem to understand how it works at all

[junior plaza]

I was hoping there is another way

[onyx warren]

Why?

[junior plaza]

it seems weird to me that this annihilates the performance completely

[onyx warren]

I explained why

It makes sense

Is there any reason you don't want to connect your monitors to your other GPU?

I don't get it

[junior plaza]

I'll try later, thanks

[fading remnant]

Only seriously high end boards these days have 8x 8x pcie 4 and above. Most cheapo motherboards say they have 2 or three 16x slots but it turns out they are utterly terrible shared bandwidth.

[devout charm]

I agree on that, but damm pcie 2.0..... that's crazy even for such motherboard

[cedar mango]

Irrelevant. The correct way for Dual-GPU to work is to put the monitor in the FG GPU, not the render GPU.
Any other configuration will kill your performance. There is a reason for that. If you connect to your Render GPU and pretend to have LSFG on the second GPU, the frames need to travel from Render GPU -> LSFG GPU -> Render GPU.

Not only that it is simply not possible to interpolate a FG frame into the render GPU without breaking the proper operation of LS, it is also extremely taxing to the system.

You are flying in and out frames from the Render GPU to LS GPU both ways, this reduce your performance in HALF. So you will essentially need twice the bandwidth to achieve it.. but you are also killing performance and latency in the process.

If I had to guess I would say you will quadruple the latency by doing it this way and for sure it will be much worse than simply using your Render GPU to do LS as well.

Pay attention to what you are instructed in the Tutorials and from respectable members here such as @onyx warren .

It's not out of a whim that they tell you to connect the monitor to the LS GPU (2nd). It's because it's needed for this to work properly.

[versed knoll]

Yep, pretty trash

You'll need very adjusted expectations and a decently powerful GPU to do anything meaningful with it

[fading remnant]

I recently got the z790 ace max, which has 2 8x slots. But it's an expensive board. Lossless actually needs super high end hardware outside of most people's reach to do things like 4k 240hz targets with good base fps.

It's possible to get away with a pcie 4x slot via oculink. But that's walking the razors edge

[elder smelt]

I think that the b650 proart is the only somewhat affordable board that does x8 x8, shame intel doesn't have a version like that

[fading remnant]

I don't know about the proart. But Ill definitely keep it in my memory if I ever go full amd in the future.

[elder smelt]

got it for $410 aud but I don't think you can find any for that price now 😅

its a good board though

[cedar mango]

Intel does have options for dual X8 X8 but only on the super expensive side as those motherboards needs to include splitting logic for the main PCIe 5.0 slot.

I kind of considered the idea but spending $400 on a motherboard and then another $300 on memory (because I'm currently on Z790 + DDR4) is not as enticing, specially considering I'll be buying for old tech so I'm waiting to jump ship to AMD with a good motherboard that can do x8 x8.

[elder smelt]

quite sad to hear

[fading remnant]

@elder smelt Yeah I got this z790 ace max for 400. Normally starting at 900 going dramatically up from there. I wouldn't spend 1000. But 400 is human enough for me considering I don't want to spend 2k going to a full amd build.

Plus I get the benefits of the high end motherboard

Which you don't get with the cheaper amd 8x 8x

[elder smelt]

that's quite the deal for such an expensive board

may your dual gpu system become a reality 🙏

[fading remnant]

Did your proart system mean you went full dgpu ?

[elder smelt]

just using single card for the time being but I bought it so I have the option of going dual whenever I want

I really don't want to cut away options by using a board that doesn't have x8 x8

also my hdd rack is blocking any dual gpu setups for the time being 😅

I can probably move it around and make space if I was bothered to

the 9070xt is beefy as hell lol

so I have to move it to the lower slot

bit of a mess but its a great system now

[fading remnant]

options is awesome. its something i factor in as well.

yeah i have one of those overbuilt 4090s, big chonka as well. the motherboard i got is pretty huge though, so hopefully enough clearance.

[elder smelt]

as long as theres space on the lower slot, it should work nicely

[fading remnant]

yeah, there's space, but only just. your 9070xt seems pretty great at lossless. looking at that dgpu chart

[elder smelt]

oh it definitely is which is why I'm not really being pushed to use dual gpus

but options are options and that's great to have

[fading remnant]

its a bit overbuilt for lossless alone, otherewise i would have seriously considered one as the lossless gpu.

maybe 4k 480hz it would have made more sense 😄

if such a thing existed.

[elder smelt]

yup lol

I'm just waiting for 4k 240hz+ 32 inch oleds to come and for them to drop in price to snag one

maybe 2 years from now

[fading remnant]

im ultimately pretty happy with the 27inch one qd oled, i like the immersion of a bigger screen, but i slightly prefer the close ppi which gives every level of dlss a pristine type of look. Which will actually be a bit more option rich/future proof.

[elder smelt]

that's definitely true but for me personally, it would feel like a downgrade coming from ultrawide

I've gotten used to a bigger screen and I vastly prefer it over anything smaller

[fading remnant]

i like my ultrawide quite a bit. still using it. Took me a day or so to adjust to the lack of edges.

each has pros and cons.

i did notice the upgrade from 175hz to 250hz, its not the smoothness so much, more the clarity.

i think there's an earlier cutoff in smoothness, but clarity (sample and hold blurring) keeps scaling with referesh much more the higher you go

[elder smelt]

that's really nice to hear

high refresh + lossless > bfi

[fading remnant]

anyway, i'll update this section if the duel gpu thing ends up working out.

this is currently an experiemental phase.

[split willow]

yeah i own 180hz Gigabyte G24F now and i see that in some games, mostly third person i dont see clearly enough in motion and i wonder if the faster monitors benefit from that Hz increase or is it more dependant on the technology that display is made on

[fading remnant]

clarity is absolutely noticable, though. At least to me. Removing sample and hold blur does not result in animation smoothness, but it does result in the ability to move your camera around and see everything at all times. 120hz and below has so much blur you end up playing like this move --- stop look- -- move-- stop look.

whereas with something like vr you tend to always be looking around. Higher refresh allows that VR type experience.

[brave mesa]

4k 480hz end game for me

120 X 4 or 180x3

[onyx warren]

Math ain't mathing

[brave mesa]

Yes

1000hz best

But realistically 480hz is the end game we getting anytime soon for 4k

[onyx warren]

At least make it 500

[brave mesa]

Overclock it

But U prob can't tell 480hz vs 500hz

[onyx warren]

Don't care

[brave mesa]

Tbh I can't decide between 4k 240hz vs 2k 480hz

I might get 2k 480hz and wait till 4k 480hz

But either way..Gute nacht

Kämpfer Flexi chan

[onyx warren]

Already?

[fading remnant]

I ended up getting 4k 27inch 240. The pixel density matters a little more than the extra hz. I made the right decision. But I've used 480hz 2k prior. And it's a big noticeable tier in terms of motion resolution. You can definitely still see the sample and hold blur in content on qd OLED 240. Only when rotating. Moving fowards is flawless. With 480 it's still not there. But a lot closer to there.

It all comes down to how much we perceive our own perception. Many people just perceive. They don't perceive themselves perceiving. So they can't form an opinion.

[brave mesa]

Yep. That why I said 4k 480hz end game.

Since you can use DLDSR which improves details and crispness. Maybe we can cope with 1440 dldsr to 4k 480hz ( yeah not as good as 2160p but still better than 1440p )

[fading remnant]

DLDSR has a ton of improvements over even native 4k. It's not better than native 4k, not really comparable, but in specific cases it can yeild great results. For example, in a game like borderlands 2 it really cleans up the image even more than native 4k does. although you're going to need a 5xxx series nvidia card to make use of it on a dsc monitor. so there's that.

[brave mesa]

Yep exactly

But seems the best plan no?

2k with dldsr 480hz till 4k 480hz native released

[fading remnant]

i have two screens right now, both qd oled, the ultrawide 1440p 175hz, and the qd oled 4k 240hz, the problem is that the 4k screen does not have dldsr support due to my 4090 and dsc.

one thing i found reproduced the feel of dldsr, was using a a dialed down "bumpmapping" shader from reshade combined with NNAA https://github.com/Sarenya/NN-Shaders

these two mixed come very close to the visual feel and aa coverage of what DLDSR does. Not quite the same, but ballpark.

better than what dldsr can do fitting into a native res container, worse than 2.25x but producing a similar visual look.

[brave mesa]

Thanks. Unfortunately the one feature I like to improve visual experience is dldsr and good sharpening filter. The other ones are headaches to set and always have a draw back of some sort.

[fading remnant]

Those nnaa shader aa combines well with dldsr actually. If you have the horsepower.

[brave mesa]

Yep. Imagine using them with dldsr

Insane result ngl.

Also which Shafer's you mean by "those" can you recommend the best? There are just too many

For me I prefer the most stable one. As in in motion and static/idle scenes it is same quality

[blazing reef]

**Windows version: ** Windows 11 24H2
**Driver(s) version: ** Nvidia 576.02 and AMD 25.3.1
**GPUs used: ** Rendering GPU: 4070 ti Super (pcie3x8), Secondary GPU: RX 6600 (pcie3x8).
**Platform information (CPU+Mobo): ** 10700k + gigabyte z490 vision G
**How monitors are connected and used: ** 2x monitors both connected to RX 6600
**Any anomalies: ** Running LSFG shows 110 FPS but in game it feels like 60fps with additional latency.

[versed knoll]

Does this only happen running the game on both monitors?

[blazing reef]

Only happens if I have both monitors on. When I disconnect one monitor, I get 60fps scaled up to 90. Without LSFG I get 80-90fps natively anyways.

edit : after testing more times and resetting my pc, dual gpu LSFG appears to work now. Hitting 4k and 100-120fps in most games without any weird latency or performance problems.

[devout charm]

hmm i wonder if using a m2 to pcie adapter would be a good idea to get the most bandwith on the second gpu

i've noticed that a lot of motherboard is only one 16x to the cpu , the other is to the chipset or a 4x in disguise

but those motherboard still have M2 that run's at 4.0 or even 5.0 at 4x

and directly to the cpu

so i wonder if it would be an idea

[versed knoll]

It can be done

Just make sure the adapter runs at the speeds you need it to

[devout charm]

pretty sure it's the cheapest idea if you want the most bandwith without having to buy those expensive motherboard

[versed knoll]

Some adapters cost like 25 dollars

Which can for some motherboards make the difference between that motherboard and one that supports two GPU's

My b550 costed me 100 dollars though there are x470's going for the same price on aliexpress (and if you throw another 40 dollars in you can get a X570)

[versed knoll]

But I do know for some other cases the gap is way larger and at that point yeah a nvme adapter is a much better choice

[devout charm]

i mean if you don't already have a mobo, yeah sure..
but if you already have and don't use all your m2 , it's the better choice

at worst you will trade ssd speed

[fading remnant]

Just a warning to those with DSC monitors. Cards from older NVIDIA generations won't recognise DSC refresh rates. So using the NVIDIA card as a primary lossless card won't be able to be run at hz above 60. Defeating the purpose of lossless.

Example. Plugging into 1050ti only reveals 60hz on 240hz OLED.

I purchased the 1050ti as a physx card. So it was not ever intended to be a lossless card. Bit I wanted to mention it anyway.

[devout charm]

hey i was wondering, with a dual monitor setup, do i have to connect both monitor to the secondary gpu? or just one is good?

[cedar mango]

All your monitors right into the secondary GPU (the one doing FG)

But, you can also do 1 on render GPU and 1 on FG GPU. Just know you can only use 1 monitor while in gaming for FG to work properly.
You must also know that using Dual monitors does have a lot of issues with FG, specially when applying RTX-HDR as the focus is lost when more than 1 monitor is present.

[devout charm]

thanks for the info

so yeah both on secondary

[vast pagoda]

wondering if we can do this on handhelds like lenovo go, rog ally and steamdeck

last time i checked, RetroGameCorps (a youtuber) reports that amd cpus doesnt play nice with external gpus. a shame since 780m can drive so much lsfg frames.

he also reportd that msi claw with an intel is very stable, making it a good choice. any one tried this setup before?

[vital whale]

Hello, Will this Docking station work for adding a GPU to laptop for LS?

[rocky lake]

You will probably need a PC power supply to power the 6/8-pin port on the GPU.
Even if the laptop supports PCIe over M.2, its quite common for the BIOS to not detect or communicate with GPUs over M.2, so look online to see if anyone else with your laptop model has tried it.

[onyx warren]

This thread just won't die

[vital whale]

Thank you

[elder smelt]

Yep

[fading remnant]

I can't get vrr working on my 6800 /4090 combo. Explored quite a few options so far. Vrr works perfect when it's only the 4090.

Vrr is listed as premium plus, seems do its job outside of lossless. But the moment I run lossless it stops working.

[rain hull]

Are you using any sync modes in LS?

Or in AMD drivers

[fading remnant]

I tried using sync modes. Disabling them all. Leaving everything at stock after ddu. Turning it all on and off in both sides sequentially and vrr continues not to work when 4090 is the render GPU then works perfectly when the 6800 is the render GPU

The 6800 does seem to take the load and vrr correctly when the 4090 is render gpu for fluid motion frames. But there seems to be something lossless refuses.

[rain hull]

Man

Tried older drivers?

[fading remnant]

Not yet. But I am being pretty thorough in the areas I'm talking about.

It's wild that it's so stubborn

I generally have success in most things in life easier 😜

[rain hull]

At that point I'd try a different Windows install tbh

[fading remnant]

Already reinstalled windows

But it was the newest one. Maybe an older windows might do something. Hard to say.

Things I have no tried are actually the rare things so I'll list them :

Older windows
Older drivers
Try HDMI 2.1 port instead of dp 1.4 port

I'm not really willing to switch monitor.

Since this is the one I'm wanting to use.

But it's 4k 240hz with full compatibility with freesync and NVIDIA features

Sometimes I can see my framerate hz (on the monitor OSD) flickering one frame up and down on certain modes. Like it's trying to freesync lossless. But it's not actually doing it. Other times it's completely stable 240. I believe the completely stable 240 is when freesync would not have worked. And when it flickers numbers that's when it would otherwise have worked if there was not something blocking it.

I see that as it attempting and then being blocked.

[sand wedge]

Windows version: Windows 11 1000.26100.83.0
Driver(s) version: 576.40
GPUs used: RTX 3080 x2 (x8/x8)
Platform information (CPU+Mobo): i7 10700k Z490 Unify
How monitors are connected and used: 1
Any anomalies: The frame rate drops by about 30% when the image is output via the second GPU.

[vital whale]

I was using LS in battlefield 2042 with great results. I upgraded to windows 11 and now I can't get good results. Any recommendations?

[rain hull]

What exactly do you mean by "great results" and how are you unable to achieve them?

[vital whale]

I locked frame to 35 in game. LS adaptive 3.0 target 70 fps, and the game played very well smooth at mostly high settings. Now it stutters and barely gets to the locked frame rate. It plays much better without Lossless scaling keeping the 35fps. I cannot find a setting that benefits 2042 now in LS. In windows 10 I was shocked how well it played and hit the target FPS. Now, no joy. This is on a 2017 laptop Intel i7 7700hq with GTX 1060 6gb. I am keeping temps around 70-73 degrees in game.

[rain hull]

No evident overlay problems? Confirmed that you're using the exact same settings as before including upscaling? Does the draw the same wattage as before?

Also, if this is with single GPU, why did you ask in a dual GPU thread?

[vital whale]

Well, I was trying to set up my in laptop GPU to work with my onboard discreet GPU. I may have screwed something up, but my other games seem to work fine. I have Nvidia FPS overlay CPU percent usage and GPU % usage. I tried to undo all of those settings. I don't believe I missed anything. I didn't get a boost from the dual GPU set up on my laptop, since my onboard intel graphics is too weak.

[tall moat]

this is big influencer is talking shit for this program any admin here talk to him and help him his do on it wrong

loseless scaling

https://youtu.be/PipMOZY8Ho8

[pulsar pendant]

There Arabians I wouldn't wanna waste my time

Prolly the moron we argued with for hours over

[rain hull]

His monitor was set to 60hz so LSFG couldn't detect above that

[brave mesa]

what has their identity/nationality to do anything with the topic? that's so cringe.

If a reviewer from Australia do a bad review about lossless scaling what will you say?

"There Australians I wouldn't wanna waste my time"

i smell hate here against a specific group of people

[pulsar pendant]

Who buys a 5090 and still uses 60hz

[pulsar pendant]

Maybe

[pulsar pendant]

2 5090s at that

[rain hull]

He probably forgot to set his monitor to a high refresh rate after switching it to the other GPU

[tall moat]

Honestly, highly doubt a tech YouTuber would forget something as basic as monitor refresh rate when messing with multiple GPUs. That's like, day one stuff

[pulsar pendant]

yup

[rain hull]

LS was limited to capturing 60fps. That can only be caused by either an overlay/instant replay feature interfering or the monitor being set to 60hz. The 60hz thing has happened in tech youtuber reviews of LSFG before.

[coarse trellis]

I am currently using gtx960 as render gpu and gtx750 as lsfg gpu to 100fps

at 1080p

seems old gpu still can be quite capable, where do I share these data to?

[onyx warren]

You can test based on the guide pinned in #💾│dual-gpu-setups and share the results there

[sleek isle]

Ever find a solution to this? I’m having the same occurrence

[elder smelt]

Nope

Never found a fix

[topaz sand]

hey is anyone having issues with the new 3.2 update with dual gpu setup? I'm having incorrect fps reading in games, for example I have 60 fps on RDR2 but Lossless is reading 100+ fps and everything stutters a lot, seems like it's not working right. Did a rollback on 3.1 version and I'm not having any issues

[rain hull]

Seems like something unrelated to dual cards

What capture API?

[topaz sand]

Both

[vital whale]

Hey, I have two laptops. The newer one with 3070Dgpu and amd Igpu works amazing with LS, base locked to 40 and scaled x7 280 fps. However, my older laptop has a 1060 Dgpu and Intel Igpu and the locked base of 35 no matter the settings scales to 35. So 35/35 . I cannot figure out what is wrong. I know LS works on Windows 11 because I have it on both laptops. The game is Battlefield 2042. The old laptop LS used to work. I must have screwed something up trying to test with the dual gpu set up and the Intel igpu . This old laptop is still good though and I wish to fix. Sigh. Update: I had Nvidia control panel global and Battlefield 2042 program both set to 35 frame lock. Choose one or the other not both. Best to lock per program and leave global settings unlocked. Just for anyone who does the same thing on accident. Now the LS works on the old laptop as well.

[scarlet iron]

After the update I'm having the same issue. Game is TRS2019 (working fine before update) but it was working fine in Cyberpunk when I first downloaded the update. Unironically the game runs better without LSFG.

I know I am using the iGPU for the R5 9600X as the FG gpu but the FG workload was quite light before the update, even for this iGPU (1080p @ 2x 70fps). Performance load should make it even lighter but the best I can describe the issue is just as bugged. FPS reading like 100/130fps with LSFG (when in-game it's ~70fps), extreme input lag (probably worse than 20fps), stutters, etc.

[proper cradle]

checked overlays?

[topaz sand]

Yes everything was turned off

[proper cradle]

only one game or everywhere?

🤔

[topaz sand]

Tested with 3 different games and always had the same issues. Everything started working fine again when I switched to 3.1

[proper cradle]

rollback to 3.1 maybe it will fix it as in settete's case🤔

[scarlet iron]

Rollback to 3.1 and older were bugged too. Idk what happened but went back to 3.2 and it was working again. The catch is it's buggy for the first 30s but then stabilizes and works as intended. This is not consistent though, I've had to rescale one or two times for it to work. Disabled Performance mode for my testing.

Alternatively, pressing the windows key (probably to put focus outside the game) and tabbing back in multiple times makes it start working too.

[proper cradle]

I guess there is some program interfering with it (similar to overlays/hooks)... or some people say it might be due to MPO

[scarlet iron]

What's MPO?

[rain hull]

Multiplane overlays, basically a Windows system that layers different things on top of one another on the screen

You can run out of "planes" which can cause various issues

[high kraken]

[DUAL GPU SYSTEMs] Performance Issues and Troubleshooting

[tall moat]

Is there chart for Motherboards that support pci 5 x8 and 4 x8 ..
..
it's hard to look at evrey Motherboard manual to check it

[proper cradle]

!s dual

[little kayak]

General information regarding the usage of dual-gpus and lossless scaling can be found "pinned" in https://discord.com/channels/1042475930217631784/1344492964298358835. Additional information including guide, capability, methodology are linked below.

[rain hull]

[DUAL GPU SYSTEMS] Performance Issues and Troubleshooting

Had to capitalize the S at the end of "SYSTEMs" lol

[valid phoenix]

do you have the setting for get higher fps on snowrunner

[topaz sand]

Do you mean the lossless scaling settings for snowrunner?

[valid phoenix]

Yes

[valid phoenix]

Do you have it?

[topaz sand]

Let me check

Sorry I don't have the settings anymore

[tall moat]

Why can't change the resolution

[mental wagon]

Try unplugging and reseating the cable - what cable is it?

And where is it plugged in