Solved Unstable behaviour from graphics card

Hi everyone, first post here
Have a very confusing problem that I can't seem to fix

Specs

Windows 10 build 19041.vb_release. 191206-1406

CPU ryzen 5600x

Mobo msi tomahawk b550

Gpu Asus tuf 3080 via corsair riser

Storage: 500gb crucial mx100 (windows), Samsung 512gb, 3tb hhd, 1gb m2 storage

RAM 4x 8GB dominator ddr4 ram

Psu Msi MPG A750GF 750W

(prior to change was a seasonic 750w gold)


Summary

- some blue screen issues

- new Psu installed

- boot manager ssd sometimes not detected, resolves after several power cycles (unknown if related)

- with no drivers desktop is stable

- with driver 536.10 the gpu clock is stuck at an at idle clock (410mhz) even in games, desktop performance is ok and is stable

- with the latest driver, gpu clock is no longer stuck, but windows performance is really poor. Desktop is stuttery and stability is low - blue screen or black screen, dxmmx errors

- black screens when drivers installed from no driver


Thinking out loud...
Can a new power supply really cause these issues? It seems to work, just not properly

Keen to hear what people suggest

Best
Boken


Full history


I started playing BG3 these past few days and had been getting some crashes to the desktop


Updated to the latest driver and played and got a dxgmms2.sys error - decided to do a clean uninstall and install with DDU


Used Windows+R to activate safe boot - on reset, the computer would pass boot step but not output any video to the displays


CMOS reset (both battery and shorting the pins) but this didn't change anything


I decided that since I was reseating the GPU I might as well install the new PSU I bought and install my new m2


After this I started to get boot manager issues where my windows ssd would not be visible inside bios


Eventually after multiple power cycles I get into safe mode and proceed with DDU to uninstall the graphics drivers


Loading into regular Windows to install GeForce experience and everything seemed to run alright with an older driver (536.1)


Checked integrity of Windows files, no issue


Tested BG3 and gpu was stuck at 420mhz clock. Msi afterburner does recognise the cars as a 3080. No overxloxk was applied.


Installed latest drivers and desktop performance is stuttery and stability is low with crashes and BSoD from desktop. Errors are dxgmms2


I go into safe mode and uninstall drivers again and try to manually install graphics drivers from a month ago and it black screens during driver install.


Upon restart the screen cycles between bios splash and black screen before windows appears. This cycle kicks me into recovery.

Thanks Phillpower,
Attaching Speccy and the mini dumps

the Seasonic is around 10 years old so I thought perhaps it was no longer stable - the MSI is just what I had on hand

Using the ASUS calculator it should be OK with 750W without OC (Note I miswrote that it was a ryzen 3600, its a ryzen 5600)

Still unsure as what the next step should be

(resolved)
Thanks for the spot Phill,
Applied the xmp and still got stuttering with the latest drivers
The screen would black out for a second and gpuz would show that the power supply to the gpu would hit 0

I saw a thread elsewhere that people's risers were causing problems so I tested without the riser and everything is running perfectly normal now.

Perhaps it got damaged when I reseated it earlier to access the CMOS, but removing the riser seems to maintain stability and performance

Thanks for your help!