Hello, Sometimes when I play PC games, my screen goes black, and the power button changes from green to yellow, like its idle. This happened twice, once while playing a PC game, and once when I was just browsing the net. I don't think its a power supply issue being that I have a Altec 450W power supply. Could it be doing this because I flashed the pipes on my videocard? but then again, that was over 5 months ago and I dont see why a problem would start now. Any help would be appreciated. I have a Sapphire X800GTO.