So, I'm using an 780ti. Performance is extremely smooth and only rarely get crashes anymore (used to get a BSOD every 40-50 mins with the older Nvidia drivers).
Anyway, just thought I'd report this:
In AA, right after the frost atronach room (In the beggining) were the Mage sents a lighting bolt on all party members, I get a huge FPS spike and one in ten times, a BSOD.
I have no other issues anywhere else in the game, no FPS drops even in massive PvP battles, so I'm thinking something's up with this spell's effects.