Hi , I have a Cooler Master 430 with 5 12" fans running , I have a Venom heatsink with a 12" fan for cooling. 2 fan's right on top of the heatsink blowing air out , and one at the back of the tower right next to the heatsink blowing air out. One fan blowing cold air onto the GPU+ the GPU has it's own fan, and one blowing onto my HDD, I have a Intel board , 2.8 dual core CPU , 2 GB memory , 500W PSU , My machine just shuts down , I have no clue what it could be , I dual boot between XP and 7 and had the same issues with both , only during game play my machine shuts down , this never happened when I had a home fan blowing into the box -- made in China. and the side cover off.I ran memory tests that passed , The CPU runs at 23 degrees Celsius on idle , not sure when I am playing games. Any assistance would be appreciated