PC Graphics

[Tbranik1]

installed a 6600 in my son's computer and shortly after that he said his computer will no long go to sleep or shut down without turning off the psu - so i tried both a shut down via the windows menu and power button and both times the computer went off for a second then rebooted - replaced the card with a 2060 and the pc woks as expected.  put the 6600 into my pc and same issue arose - the pc would not shut down (soft or hard shut down) - card operates fine when on - plays Horizon Zero Dawn perfectly maxed out 1080p and no issues its just the shut down issue.  What to do?  

Specs i5 11400 CPU: PSU Corsair 650W: 16gb ddr4 ram (corsair  vengeance): gigabyte 560m M/B: Video Card msi mech rx6600: wd black 500gb m.2

both computers are pretty much the same save mine has win 10 and my son's win 11 mine 1x16gb and my sons 2x8gb. 

both pc's did have a nvidia card in there but i uninstalled everything from nvidia as far as i know.

[elstaci]

Check Device Manager for any errors in there especially the "Display" category.

Also check Windows Event Viewer under "errors" and see if you see anything related to your GPU or AMD driver.

When you shut the PC down via Windows Shutdown option did the screen go gray for while as though it was waiting for a background app to finish doing something?

Also in BIOS set your PC not to reboot after a shutdown. That way it is easier to troubleshoot shutdown issues without going into a On/Off cycle.

NOTE: To completely erase Nvidia from your PC you need to use DDU - Display Driver Uninstaller. Possibly Nvidia Graphic driver fragments might still causing problem with the AMD driver.

[Tbranik1]

I have never heard of restart after shutdown option in bios but i will look for it.  i will try to get any "fragments" of drivers out of the pc though- there were errors in the device mode under safe mode only and i took those all out but i will also look under the Win log to see if anything is there i didnt see any under hardware errors though last time i looked - im gonna try to swap out a different AMD card and see if its not the card thats bad?

[elstaci]

The BIOS settings I was referring to was if you lost external power (Black/Brown out or blown fuse)  to the PC, BIOS would automatically restart as soon as power was restored.

Yes in Windows you can configure the PC not to restart after a failure or BSOD.

Yes I would install your GPU card in another PC and see if it does the same thing.

Found this tech site about when the PC won't shut down offering some troubleshooting tips to fix the issue: https://recoverit.wondershare.com/computer-problems/my-pc-wont-turn-off-or-shut-down.html

[Tbranik1]

Ok swapped out the msi mech 6600 with msi mech 6600xt and everything works as expected - on a side note i tried the 6600 in a msi motherboard and lost all sound - switched out with rx6600xt mech and it works perfectly? 

[elstaci]

Sounds like you have a defective MSI 6600 GPU card. I would open up a MSI Warranty to RMA your GPU card to have it checked.