“So, why are we pitting the X700 Pro and not the XT version against the 6600GT? The X700XT has not actually hit retail yet and the word on the grapevine is that it may never hit retail. Current pricing also puts the 6600GT and X700 Pro head to head, with no more than a £10 difference between them. Currently, to pit the 6600GT against the X700 Pro makes perfect sense unless ATI does the right thing and lowers the price of the X700 Pro.”
This is an in-depth look at both cards, and they are put through multiple benchmarks. Before you buy, read this review.