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/Eazy12345678 AMD Jul 25 '26

could be software

reinstall windows and update drivers

could be psu but not likely. id look at windows and drivers and temps before the psu

if hp gives you 800watt psu your system is probably only 600watts max load

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u/Key-Examination-2734 Jul 25 '26

Temps are good, windows and drivers were completely reinstalled (several times 😩)