Well just today I went out and bought another psu. This one's a 520 Watt sucker that's made for dual PCIe cards and such. If power's the problem, it can't even handle the one =/. The card's still crashing after random usage in 3d applications, not just World of Warcraft. My friend gave me Doom 3 and it also has the same problem: "VPU Recover has reset your graphics accelerator because it was not responding to commands", or something approximatly like that.
I got a couple fans as well to cool the system and got those in to help as well, but alas, still no luck.
ATI is taking forever to diagnose the problem, and it's really getting quite annoying. Sometimes it goes hours without problems, and then others it will go for only a couple minutes. It doesn't matter what settings a game is running at, 640x480 with minumum quality or 1280x1024 with all the settings maxed out, it still dies.
I guess if you guys can't think of something I'll have to wait until ATI responds. If I knew things were going so bad I would have picked something with a good return policy =(.