I recently added a radeon 9600pro 256mb to my system and have been confronted a drastically annoying problem in which all the textures become odd green, purple, and other colored block artifacts. A friend suggested the power supply might be the problem, but the new 450w PS doesn't do any good. Furthermore, the system doesn't seem to be running too hot. It can get up to 45 degrees C, but normally hovers around 40. If I set the card to optimal performance in the control panel it helps a bit but after a while the strange atrifacts return. Please help!!!