Does anyone know why my dual GPU does not work?

[bleak depot]

Does anyone know why my dual gpu setup isnt working?

Setup: 9070 xt & 6500xt @1440p

Situation:

When plugging in my DP to my 2nd, or LS GPU, my pc sets the LS GPU as the preferred for gaming (as seen from 100% util from task manager) and does the same thing when I plug in my main gpu where it sets that at the preferred gpu for gaming. When connecting to the main GPU I am no longer utilizing my 2nd GPU for LS.

For some reason whenever I try to set a preferred gpu on windows 10 it only shows 1 out of the 2 gpus. It will only display my 2nd gpu when I plug in the HDMI to it but now still only shows 1 gpu for both options.

A summary of what I tried
-plugged DP to LS GPU while setting it as the preferred in LSFG. This would cause my LS GPU to automatically set itself as the preferred GPU on my main PC.

[calm lodge]

got the same issue with 7800XT and 6600xt, i'll be following this place for when help gets here

[bleak depot]

I’m thinking about just upgrading to Win 11 if no can figure it out

[calm lodge]

I just did to try it out, I’ll keep you updated on how it goes

[bleak depot]

Same started the update before I left for work. Hopefully the preferred gpu setting on win 11 will work

[calm lodge]

no matter what i do or how manytutorials i follow, i can only get fram gen to run on the 7800XT, if i ever select the 6600XT as favorite GPU, i get 5 to 6 frames, 20 tops no matter the game or resolution

[calm lodge]

if you manage to make the LS GPU work alongside the main GPU, please ping me, i feel stuck so far

(game tested on was hunt showdown, in a lobby alone)

here the only config i manage to use to get proper frame gen

was trying to follow this tutorial

https://www.youtube.com/watch?v=JyfKYU_mTLA&ab_channel=AncientGameplays

my guess is that i should set the output display to the 6600XT and connect my displays to it, but no matter what i do, i can only see the 7800XT as an option

[bleak depot]

yea man same. Ive tried everything. At one point I was able to get it to kinda work where I see 100% util on both my cards but the lag was just so bad. What I did notice was that when I connected my display to my 2nd card and turned off LS, GPU 2 would have 100% utilization which to me tells me that the game is running on GPU2. But when I try to connect it to GPU1 it does the same thing where utilization is 100% for GPU1

I think this might be a wwindows problem where it forces whatever gpu the display is connected to becoming the main render despite the settings preferred gpu settings we input for windows settings

[calm lodge]

Seems like that would be the issue yeah

Couldn’t find any solution or workaround for that just yet though

The tutorial I sent mentions « setting the second gpu to only generate frames and scaling » be besides just mentioning it, he doesn’t show how to do it at all besides setting préférez GPU to the secondary one

[bleak depot]

Tried connecting a second display and didnt work. Ive got a 3070 laying around so I might try that

Honestly though this app wasnt a waste of money still bc I guess it can stack with radeon FG on top of its own LSFG. I went from 100-120 frames with radeon FG on Monster hunter wilds on 1440p max settings to 165/175 stacking both

[astral orchid]

You can stack them wtf I must try this

[bleak depot]

yea it works incredibly well

I was curious how high I could get and it was 270 on max settings lol

[bleak depot]

@calm lodge another guy made a new forum with a similar problem to ours. Maybe it has issues with 6000 series cards?

[astral orchid]

Stacking Frame Gen on wilds. Using in game FSR 3 Native upscaling. Turned off upscaling on LS and just have Frame Gen on LS

Using a GTX 4070

[calm lodge]

Could you ping me in there ?

[calm lodge]

That’s nice but a bit off topic sadly

[light mica]

Well the fact that only 1 gpu would show up at a time for both of you is weird. It sounds like a setting somewhere is putting your second gpu to sleep/powersaving. And it only wakes up if a monitor is connected to it.

You both upgraded to windows 11 right? If you look at the default high performance gpu setting, under advanced graphics settings in windows, does it show both gpus now?

[calm lodge]

It always did

[calm lodge]

I set my settings as in the video I sent, and therefore the High Performance GPU is the 7800xt

[light mica]

I see, I misunderstood. I had thought you were having the exact same problem as Sudden.

[calm lodge]

Yeah I am having a hard time understanding what we are doing wrong sadly

[calm lodge]

This might be the closest we are to figuring out the issue

[calm lodge]

@bleak depot I may be onto something

I have removed my 7800xt and plugged it into my PCIe gen 5 port, and after using passmark I notice VERY different scores (3 times difference)
My guess is that it simply didn’t have enough bandwidth, so I should try and work something out with my PCIe lanes

Found my issue

I was plugging my 6600XT on a PCIe gen 3 X16 lanes, that seems to be the problem

Yeah I would need to change mobo to have proper pcie slots for that it seems

[calm lodge]

Before doing that I’m gonna try to use a riser cable to use the gen 4 PCIe slot that I have in mine

Should arrive tomorrow, we’ll see if it changes anything

[calm lodge]

Bah, even with a riser cable to a gen 4 PCIe slot, the results are very similar (although a bit different)

I’m gonna have to get a new mobo it seems

[bleak depot]

Thats unfortunate. Seems like only the X version are able to make use of a 2nd gpu. But personally, dropping 150+ on an am4 mb wont be worth it

[calm lodge]

I am already using an x670e gaming plus mobo, so I am quite dumbfounded

And somehow now without changing anything and only using my 7800xt, I can’t seem to get proper FG anymore

Even though the 6600xt isn’t even in the system anymore

[calm lodge]

Since I don’t know what else to do imma try to use chat gpt to get more leads on what to do