Re: GTX 285 To GTX 480 Upgrade Performance Problems
I'd bet your cpu is fine walterman. My 480 did just fine on a stock clocked 955BE.
Make sure you're doing a clean driver install, including cleaning left over registry bits etc.
Also check your temps/fan speed and make sure the 480 isn't throttling on you.
@Intel17 - you should never have to reinstall windows to swap a video card. I've swapped ATI and Nvidia on the same install with no problems.