Your CPU and possibly your RAM are getting too hot. You probably don't have enough airflow. If you have a lot of junk in your case (wires blocking airflow, etc) look at getting a liquid cooling system. It's easy to install. I figured mine out in about 30 min or so and the directions were all in Japanese.
If I\'m curt with you, it\'s because time is a factor. I think fast. I talk fast. And, I need you guys to act fast if you wanna get out of this. So, pretty please with sugar on top, clean the fu**ing car- Winston Wolf, Pulp Fiction