Those are my Computer Specs: Gigabyte GA-K8NXP MotherBoard AMD Athlon-64 +2800 512DDR 2700 Nvidia 6200 XFX VGA Card Western Digital 80GB IDE HDD The problem: I recently got a new 500Watt PSU, I had a problem in the MB, it didn't start it seemed I had to juice it a little bit. but now its working fine but when I start some games it flashes and freezes. I have to minimize the game and maximize it again to work again. Note: this problem only occurs when the GPU Temp. gets above 50-55 Celcius.