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GPU causing PSU failures?

MP98n
By MP98n
in Troubleshooting
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Posted

Hello,

 

I recently completed my new build. I am using a 3080 FE with a Corsair water block on it, a 5800x, Gigabyte Aorus X570 i Pro Wifi motherboard, Corsair SF750 PSU and Corsair vengeance RAM. I had used all except the 5800x in my previous build, with the additional exception of the 3080 FE being stock and not water blocked. When I powered it on, I got nothing; no post, no bios buzzer error codes. I tried various combinations of old hardware to the point where I think it's probably easier to show what I did and what the result was as a chronological list.

 

  • SF750, 5800x, 3080 --> NB
  • SF750, 3600, 1080ti --> NB
  • TX750M, 3600, 1080ti --> Boot
  • TX750M, 5800x, 1080ti --> NB
  • TX750M, 3600, 1080ti --> Boot
  • TX750M, 3600, 3080 --> NB
  • TX750M, 3600, 1080ti --> NB

Then, since both PSUs appeared to be dead, I waited overnight before trying again in the morning.

  • TX750M, 3600, 1080ti --> Boot
  • TX750M, 5800x, 1080ti --> NB
  • TX750M, 3600, 1080ti --> Boot
  • TX750M, 3600, 3080 --> NB
  • TX750M, 3600, 1080ti --> NB
  • SF750, 3600, 1080ti --> Boot

I then stopped testing since I didn't want to risk any more components. I've updated the bios to the latest version for the MoBo (F36c). From what I can tell, the 3080 appears to be damaging the PSUs. I don't know why the 5800x isn't working either. I can only guess that it was either defective (which I know is unlikely) or somehow got damaged on the initial boot attempt. Just wondering if anyone has any thoughts really

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Posted

Have you tried updating BIOS?

 


And also:

Quote

[2] Corsair SF units with LOT codes from 194448* through 201148* have potential problems, Corsair conducts a voluntary replacement, source.

Found that line in the PSU tier list.

When i ask for more specs, don't expect me to know the answer!
I'm just helping YOU to help YOURSELF!
(The more info you give the easier it is for others to help you out!)

Not willing to capitulate to the ignorance of the masses!

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56 minutes ago, HanZie82 said:

Have you tried updating BIOS?

I have. I updated to the latest version (F36c).No luck.

 

56 minutes ago, HanZie82 said:

And also:

Found that line in the PSU tier list.

My SF750 is from lot 211448*. I'm also getting the same repeatable problems with the TX model as well. I really don't think it's the PSUs that are the issue, and more that they're being 'tripped' in some way. They stop working for a while and then come back, almost like a self-healing fuse is blown or something. I'm not even sure if computer PSUs use those though

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So it seems to have sorted itself. I left the whole system powered off overnight, and tested 3600/1080ti with the TX PSU and it booted. Tested 3600/3080 with the same PSU and it’s booted. I have a replacement 5800x arriving tomorrow so I’m not going to push my luck and test the CPU again.

 

The only real change I made was removing the water block from the 3080 and reapplying the stock cooler

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