Hello,
After a lot of research, I realized that my concern for Crash came from the fact that my graphics card was perhaps too Undervolted with the MSI Afterburner software.
Symptoms :
1- AC Valhalla Crash on desktop without error.
2- "nvlddmkm" error in the Windows event log
Solution :
1- Stop the undervolting of the graphics card with MSI AfterBurner: (Put the default settings).
2- Only use MSI afterburner to throttle graphics card fan speed if you want.