All the reviews of 7900GTs I've read on the web have said that nobody is deviating from Nvidia's reference design on their cards much, if any. So I'd guess the only differences would be intangibles like warranty and game bundle, and whatever speed binning happens to the chips themselves. if EVGA's is stock-clocked higher then maybe they binned their stockpile of 7900 GPUs for better ones than PNY is using on average...?