Question Pc screen going black for a few seconds with high GPU power draw, fans ramping, CPU usage spiking.

Asymptomatic

Prominent
Jul 9, 2022
13
2
515
Windows 11
Palit 3080
12400f
B660 Tomahawk
Corshair TX850M 80+ Gold
16Gb Ram

Was having issues with random black screens and drop in performance. Made a clean install of windows and things were okay for a month or so then I had a BSOD alt tabbing diablo iv with a stream running in the background. GPU was re-seated before I did a clean install to see if that was causing the issue but it didn't solve anything.

Just now the black screens have started again. Link to afterburner hardware monitor below from the time of crash. The gpu power draw spikes, the fans ramp to 300%???, and the cpu usage spikes. What's happening here?

View: https://imgur.com/a/xDpTruC
 
What's happening here?
View: https://www.youtube.com/watch?v=wnRyyCsuHFQ

(See 4:00 - 4:47, or give the entire video a watch)

A)Gpu's voltage regulator craps its pants during one of those high power spikes.
B)Power spikes are too long or high - psus can operate a little over their rated wattage, but only briefly.
C)Both.

What you can try:
-A new(er) power supply.
-Test the gpu in someone else's PC. Perhaps there's a PC shop near you?

-Using afterburner or another app of your choice, experiment with lower power limits on the gpu and see if it stops crashing. Ex: 95%, 90%, 85%, etc. If you successfully stop seeing crashes, you can bump the core clock back up a little and offset performance lost.
-Start using fps caps, if you haven't already. No fps caps + very high fps = higher power spikes.
-The last 2 can be done in combination.
 
Okay thanks for your help. I was undervolted before but with 109% power limit. Dropped the power limit to 100% and changed the undervolt from 1905@900 to 1845@875. Stable playing d4 so far, seems to be running smoother actually.