I want to overclock my 6800GT for games like Half-Life 2 and Doom 3, but the thing is that every time I've tried in the past, I get the blue screen saying hardware failed, so on etc. etc. So is there anything I should know about this? Is there some heat sensor that makes the screen pop up when it gets so hot that I can turn off? I've heard that the temp on the graphics card can go up to 120 c, and I know damn well it isn't getting that hot. Any suggestions?