So i have a gtx 670 ti. Ive had it for about 5 years and last year or more my game have been running at 90 deg c +. Recently it started to overheat and go into the 101 range so i took my pc apart and cleaned it like i normally do because i have a very dusty room. Now after i reinstalled everything i noticed that my gpu would go up in temp when playing a game with high animations or anything. When it starts to go up in temp it doesn't cool itself it just heats up to about 103 and then black screens and the fans go crazy. At this point i restart my computer and everything is fine. I have recently just replaced the thermal paste to see if that would fix the problem and it did not. I am thinking it has to do with my heatsink being loose or something. please help i am so clueless and strapped on cash. thanks all