Isn't this outdated and long fixed by AMD and microsoft ? That's what it says on forums. By the way Nvidia never came back to me about CS GO and they even deleted all my ticket's about it,... Very strange.
My issue seems to be solved, I checked CS GO with monitoring program and now my FPS is very stable and GPU get's used how it should. Maybe it's true updates, bios updates or due to MB swap, I RMA'd mine because of weird USB behavior.