Originally Posted by
Lathais
How would a PSU affect FPS? It either powers the parts and works or doesn't work and shuts down or fries something. Replacing a PSU will not increase FPS at all.
Also, it will not draw anywhere near 650W, even OCed. A 550W PSU would be more than enough, it's listed as requiring that in case you have a firecracker PSU or one that does not deliver what it says. Make sure you have a decent PSU and a 500-550W is fine.
Also, WoW does not like AMD CPUs, GPUs are fine. Sure, in the really low end GPUs it favors nVidia, but WoW is not graphically demanding, it's CPU demanding. A 390 is more than enough to "brute force" past the favoring nVidia point and max out the game.