Have had this ongoing for awhile. All drivers are up to date to my knowledge.
Problem occurs on attempting to shutdown or restart, and it doesn't happen consistently. I can tell when it is going to occur if I launch a game and am given a black window for the app, or if Steam refuses to start despite Task Manager stating it is running in the background. Some games will refuse to start period, but usually will be the aforementioned black window
GPU was RMA'd and have swapped out for another one as another test (which it did not give a driver power state failure error, just merely crashed due to be a significantly older card). Currently trying a different CPU on suggestion ever since this crash on Monday and haven't seen anything since, but I suspect it's not related to hardware at all as the issue is incredibly sporadic. Typical CPU is AMD Ryzen 7 3700X, but don't think it may make much of a difference.
Dump files: https://drive.google.com/open?id=1J2xvTWvV6VajO6RMTvtn_VH18aHuRbeR