Using gameworks as a con for a hit in performance is such a desperate attempt to make AMD look better. amd cards dont handle tessellation as well as nvidia newer cards. nvidia older cards not perfoming as well is because of the same reason as amd's. amd and nvidia do the same things in the market promoting bias effects,software, api etc. amd's mantle was not free and only amd used it. nvidia using its gameworks is no different. and just today nvidia released new drivers for this game.

So it will alot or alittle?

He says that his X2 6000+ 2Gb ram and evga 8800gt run crysis's benchmark with an average of 55 fps on high at 1024x768?

Everywhere I look online even sli pc's dont do that good, let alone single cards.