PC wont POST after updating 3090 driver | Linus Tech Tips | Page 1

real granite Jan 7, 2023, 5:00 AM

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Hi, I have bought a (used) 3090 TUF Gaming, the first time after installing it it worked without problems, although the fans were spinning really fast. GPU-Z told me they were spinning at 3000 RPM while still at 0%, still everything got recognized and it worked (did not test high load).

After a minute or so GeForce Experience asked me If I wanted to update my nvidia Driver (had a 1070 before the 3090 installed and didnt use DDU yet). I pressed yes and after an attempted restart the PC was stuck in POST and EZ led showed VGA.

So I put my 1070 back in and everything works without problems. tried DDU and CMOS reset but still cant boot anymore with my 3090.

Specs:
Corsair RM750 80 Plus Gold
2x8 Gig of Crucial Ballistix 3600MHz
msi B550 Gaming Plus
AMD 3700x

I know the PSU is on the weaker side, and I may also fucked up because im only using a Pigtail Cable from the PSU (currently cant access my other cables).

just want to know if I have any chance fixing the GPU or If i have probably fried it?

modest moss Jan 7, 2023, 5:10 AM

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Update your motherboard BIOS. Also, if you can, boot with BOTH cards installed and update the VBIOS of the 3090

real granite Jan 7, 2023, 5:13 AM

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Ive tried booting with an 1050 Ti from my plex server (because it doesnt require any Power from the PSU) and the 3090 and its still stuck at the same step.
1050 ti alone works flawlessly.
looking up If I can update my bios right now

modest moss Jan 7, 2023, 5:14 AM

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Boot with the 1050ti in the top slot.

real granite Jan 7, 2023, 5:14 AM

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also tried that allready, still not working

modest moss Jan 7, 2023, 5:15 AM

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Okay. Manually set your PCIe lane speed to 3.0 and try again.

real granite Jan 7, 2023, 5:16 AM

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allright, goigt to reboot now and checking that

wise slate Jan 7, 2023, 5:20 AM

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Maybe you don't have enough wattage you are using 750 watts maybe it's time to upgrade the psu and are you using two or three separate pcie cables?

modest moss Jan 7, 2023, 5:23 AM

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Do you have ALL of the power plugs on the GPU populated?

real granite Jan 7, 2023, 5:24 AM

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Yeah the card only has 2 power plugs, but as I said I am using a pigtail/y-splitter cable

modest moss Jan 7, 2023, 5:25 AM

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Y splitter.... show

real granite Jan 7, 2023, 5:25 AM

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wise slate Maybe you don't have enough wattage you are using 750 watts maybe it's time to u...

Yeah. I hoped that it would work without that for now

wise slate Jan 7, 2023, 5:25 AM

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You need to use more than one pcie cable

modest moss Jan 7, 2023, 5:25 AM

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Show the Y splitter now

wise slate Jan 7, 2023, 5:26 AM

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Sorano chill

modest moss Jan 7, 2023, 5:26 AM

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If he's using an 8-pin to dual 6-pin the card won't boot

real granite Jan 7, 2023, 5:26 AM

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modest moss Jan 7, 2023, 5:26 AM

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Oh. Just using a SINGLE GPU cable.

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Yeah, no that's not going to fly at all.

wise slate Jan 7, 2023, 5:27 AM

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Yeah no you need two

modest moss Jan 7, 2023, 5:27 AM

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The GPU can sense that you are using a single cable.

real granite Jan 7, 2023, 5:27 AM

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Have I damaged my gpu already?

wise slate Jan 7, 2023, 5:27 AM

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No

modest moss Jan 7, 2023, 5:27 AM

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No. The GPU is just refusing to initialize.

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It's detecting a short on the #7 and 8 pins on both connectors so it is refusing to initialize.

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Those are sense pins on the PCIe 8-pin connectors.

real granite Jan 7, 2023, 5:28 AM

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So that it actually did start the first time was a failure?

modest moss Jan 7, 2023, 5:28 AM

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Probably because the driver was not loaded and the GPU not under load.

real granite Jan 7, 2023, 5:29 AM

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Alright

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Well thanks, that's a relief

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Seems like I will have to visit my mom then and have to get the cable from the basement

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Thank you guys!

real granite Jan 7, 2023, 5:34 AM

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modest moss It's detecting a short on the #7 and 8 pins on both connectors so it is refusing...

may I just ask why these pigtail connectors even exist?
sorry, just want to learn why they exist.

modest moss Jan 7, 2023, 5:35 AM

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Because they are meant to simplify runs between multiple devices that won't draw the full power load.

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So, for example, between a GPU and a capture card or powered sound card.

real granite Jan 7, 2023, 5:35 AM

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ohhh I see, thank you!

wise slate Jan 7, 2023, 5:45 AM

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You can use pigtails on lower end cards like a 3060ti since it doesn't need as much power as a 3090 for example if it has a 8 and 6 pin you can do that no problem.

real granite Jan 11, 2023, 4:24 PM

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So I came back today and it seems like I still have the same problem with 2 different cables ☹️

#PC wont POST after updating 3090 driver