My pc keeps crashing when I play games. I used to play games with my integrated graphics card, and after installing my gtx 650, even the graphically lower games freeze and eventually crash my pc. Whether they are more graphically intense or very low end, the game starts off by freezing, and I have to ctrl+alt+delete to unfreeze it. After about 20 minutes, the entire game doesn't response, the ctrl+alt+delete method doesn't work, and I have to turn off my pc. What can be some possible solutions to this?