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 that was about 5 months ago, and I dont see why it'll be causing problems now. What can the problem be? My videocard is a X800GTO.