System crash while playing Open GL games

[dababus]

My system hangs up or the screen blacks out, when I play Opengl Games, espeically SOF, Serious Sam and Oni.

What could be the problem. Using Geforce2 with 6.49 detonator drivers. Agp 1x right now. Please help. thanks

 

[madthumbs]

Could be insufficient power either through your motherboard power hubs or from your power supply. Just a guess.