So my problem is that every single game crashes after 15-30 min of gameplay.I play and then suddenly the game freezes, all I can do is to ALT-TAB to the desktop and sign-out then sign back in into windows so the game closes.I never had such problem in the past, this randomly appeared since like 2 days. I already formatted the HDD and reinstalled windows, also I reduced the overclock on both CPU and GPU back to stock but the problem still exists. I also checked my temps and everything seems fine, not even close to overheat.