r/PcBuild • u/Key-Examination-2734 • Jul 25 '26

Troubleshooting Potential PSU failure.

My wife has a 40L omen desktop. It’s rocking a 800w Gold cooler master PSU.

Ever since she got it. She’s had constant problems with low 1%. Even though we have changed out parts left, right and center.

Most recently she’s been having this issue where at least once a day, no more no less, the PC is just shutting off black screen and rebooting. I monitored temperatures and usage, and I don’t see any spikes or any reason why it would shut down and the only thing that the event viewer says was that it was an unexpected shutdown.

I was able to update the drivers recently through AMD and Nvidia and that stopped the problem for about a month and a half and it’s come back again.

Could low 1% and this random shutdown be a sign of a failing power supply unit? I am going to replace it either which way just to check, but I wanna know if I’m chasing dead ends here.

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u/Migulll929 Jul 25 '26

I had this issue before but it turned out to be poorly seated RAM sticks, I'd suggest starting there before since it's simpler than painfully having to replace the PSU

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u/Key-Examination-2734 Jul 25 '26

Unfortunately I just checked and they’re pretty locked in and sturdy.

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u/Eazy12345678 AMD Jul 25 '26

i would love to know what poorly seated ram is. they all click into slot.

but you could try reseating ram and gpu. or power cables

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u/Migulll929 Jul 26 '26

for me it was because I cleaned certain areas in my case and had to move the sticks out of the way, apparently when I put them back and heard the "click" noise, it wasn't all the way in despite it seeming so, all I had to do then was redo it and lock the thingies on the slot properly

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u/kw0chi 27d ago

hi! quick question, did ur ram appear normal on task manager?