Hey everyone. Many of the games I play on my PC have some kind of artifact or rendering error in them. Artifact tester doesn't pick anything up. The games I am having the most problems with are virtua tennis and the vietcong demo. In virtua tennis, the shadows flicker, some textures are rendered incorrectly, and the players mouths have black triangles on them. I think that Vietcong has texture clipping problems. Do you think it is a driver issue (Cat 3.1s) , a heat issue (I only have 1 case fan), or a power issue (my "400 watt" PSU has some pretty dire specs).