beggiining gameHow much playtime in the game? Sounds like a Heat issue.
I had no problems when I took vacation last month. Might want to disable XMP on your Ram that might help
Right Click if on Steam to verify files then make sure you have the Latest Nvidia drivers. I had problems with Diablo 4 recently and it was NV driver related.
temps are ok also someone on youtube have the same drops with similiar pc