New player and new computer. The video card is a Geforce RTX 3080 10G and is way overkill for the game.

I was able to play about 20 hours with no issues whatsoever. Everything set at Ultra and looking great and playing perfectly.
Then I had a GPU crash. Now I can't play for more than 10 minutes and the GPU crashes.
I've uninstalled/reinstalled drivers. Verified the game content, restarted (of course) checked for windows(11) updates and multiple other things. This is the only game I have on this computer other than Witcher and it runs fine.
Any ideas?
Thanks!

Need a full posting of your computer's spec, a screencap of memory usage, heat numbers and if you tried plain vanilla Skyrim with no mod manager.

Also, how do you know its a GPU crash?