Strange gpu/psu problem

Sgt_Pepper · 6 Mar 2023 at 20:24

So my monitor/PC randomly shuts off with no display signal, sometimes after 5/10 minutes sometimes it will stay on for hours, but also when this happens i get no power from the usb port to my keyboard or mouse. A restart does nothing. Resetting bios does nothing.

The only way i can get it to reboot is to unplug the pcie cables and plug them back in. Before I rush out and spend £800 on a gpu, do you think there could be a chance its the PSU? I have no spare parts anymore to test with

Mr Mcgoo · 7 Mar 2023 at 01:05

what psu do you have? how old is it?

Sgt_Pepper · 7 Mar 2023 at 05:28

I have a Corsair Ax760i running a RX6800 bought it when the 780gtx,s came out so prob 9 years old.

It’s just strange, on Dec19th i posted on here about buying a new gpu’s as it was doing the same thing and i thought the gpu was dead. But I rebuilt my system fresh install. And its been fine ever since. Prob played 100hrs of rust in that time. No overheating or anything. Now were back here again lol.

Gonna have to find someone who can run my card in their system for a few hours see if it persists.

therealdippy · 7 Mar 2023 at 13:58

Sgt_Pepper said:
The only way i can get it to reboot is to unplug the pcie cables and plug them back in.

Are you referring to the GPU power cables? Do you mean that you have to remove them, boot the PC and then plug them in?

Sgt_Pepper · 7 Mar 2023 at 15:22

therealdippy said:
Are you referring to the GPU power cables? Do you mean that you have to remove them, boot the PC and then plug them in?

No in order to get the pc to boot, i have to shut it down when it crashes, unplug the 2 8pins from the GPU plug them back in then turn on the PC. Its the only way i can get it to boot after it blackscreens.

If I just shut it down then restart it, it fails to boot, no bios no lights on the keyboard or mouse. Just led lights and cpu and gpu fans spinning.

Probably just gonna order a new PSU, start with the cheapest part. If that doesn't fix it, I can always recoup most of the cost by selling it on.

therealdippy · 7 Mar 2023 at 15:42

Yes, those are the power cables for the GPU. Your symptoms point towards a PSU problem. If you disconnect all the cables you could try the self test button and see if it indicates any problem. You could also try using spare 2+4 outputs in case the ones you are using have a problem. Also I see that you have an i version PSU. Do you have a Corsair Link cable connected to USB? If so you can use iCUE to check if there is any current limiting to the outputs.

Sgt_Pepper · 8 Mar 2023 at 18:09

All the spare cables including the corsair link got lost when we moved house.

Tried a new PSU same problem, I'm at the point now where I'm not sure if this hobby is worth another £800-£900 for a Mid-Tier GPU just to play rust for a few hours a week.

Mr Mcgoo · 9 Mar 2023 at 11:33

the issue you have seems to point to the psu but another psu shows the same symptoms. Have you tried another gpu?

Sgt_Pepper · 9 Mar 2023 at 12:47

Mr Mcgoo said:
the issue you have seems to point to the psu but another psu shows the same symptoms. Have you tried another gpu?

Sold my spare GPU’s when we moved house last year. The only real upgrade path from a 6800 is 4070ti or 7900xt both vastly overpriced.

EDIT: will hold off see how i feel in a month or two.