Please post your full system specifications and PSU, I am running 21.11.3, I ran some of those drivers and didn't have a problem with my Powercolor card.
Also what was the PSU Output during the tests for 12 & 5.0 & 3.3 Vdc? They all should have been -/+ 5% tolerances. For instance the 12 Vdc should have shown a minimum of 11.4 Vdc or higher during the testing.
Run OCCT GPU MEMTEST and see if your Ram check good without any errors.
Here are some GPU testing software from this tech site: https://beebom.com/best-tools-stress-test-gpu/
Also run MEMTEST86 or Windows Memory Diagnostic just to make sure your System RAM Memory is physically good and not going bad.
If the PC is crashing using a Stress test, at least, that indicate you have some sort of issue with either the GPU card or driver or some other hardware.
I hope you get it fixed!