Stryke3333,
I'm sorry the power supply didn't working out.
Antec is one of the most best names when it comes to power supplies, that can not be the problem.
Have you already measure your voltages from your mobo???
As your system crashes, mostly the main CPU gives the problem not the VPU (ATI also uses VPU recovery, that works alomst anytime.)
This was based on the problems that I have with the r9800.
You can try a few things (there is maybe a little chance).
- Set your CPU on a higher voltage setting
- Set your AGP on a higher voltage setting, 4x setting en disable Fastwrites.
Use the nVidia nforce utility, to give you control over the FSB setting and try to experiment.
Maybe sound this stupid, is your system grounded to earth.