3d rendering related crash, need help

[michaelsuave]

ok, here is the skinny. I'm running a 9500 radeon pro, 512 mb ram and i have an MSI nvidea 2 motherboard and i'm running windows xp. my problem when i start rendering 3d graphics (playing a game) is the eventually the system will lock down on me, processor goes blank (because the little red light is no longer flashing) and the screen locks down, can't control alt delete, have to do a manual restart or power down. I'm thinking that it might be my motherboard, i need some suggestions on how to fix this problem, or if that doesn't work, a suggestion on a good/well tested tried and true motherboard. I'm not as familiar with whats the best on the market in motherboards, so if you could help me out with this, it would be great. thanks guys.