Whenever I start a game (Mafia II, Starcraft II) and other high end games ... my pc shuts off without warning. It just clicks off and I would have to physically press the power button to boot it back up.
It is rather frustrating. I have a 500W power supply, and I made sure there is no dust and that the case fan is working (and the gfx card fan) however... I do see the my gfx cards idle temperature is 65-70.
What is the problem?
Gfx Card: ATI HD4850
Processor: Intel® Core2 Duo CPU E7300 @ 2.66GHz
Motherboard: Intel DG31PR