Hi, I just bought my new Radeon 9800 Pro, removed old NVIDIA drivers, installed the latest DirectX and Catalyst drivers from ATI and .... it crashes every time I try to play a 3D game. My computer just shuts down. Not a restart but a shutdown. I also had it freeze or shutdown 3-4 times while I am not playing any game just browsing internet. But it shuts down EVERY time I try to play Order of Down or Anarchy-online or Doom 3 for example. My configuration is Gigabyte Motherboard with AMD 2000+ Xp processor, 512 DDR Ram. My power is a bit old .. myabe thats the problem, I dont know the brand its only " AC 230V " on the back of it .. if thats the problem what should I do .. or is it overheating ?