This new card outperforms the 8800 GTS 640MB in almost every game out there and performs only about 10% under the GTX, yet it costs half of the GTX. Memory Express is currently selling the Superclocked version at $280. If you're an enthusiast gamer and was considering on upgrading, this is the sweet spot for you.
This graph pretty much says it all:
Games benchmarked included Unreal Tournament 3 and Crysis.
http://www.tomshardware.com/2007/10/29/geforce_8800_gt/