Seriously, go look at benchmarks..
And listen to that I've said to you for at least the 4th time...
Crysis is crap, the engine is crap and over demanding, biased towards nVidia cards, and mediocre story line at best.. Its to over demanding that the only two setups to ever get what your wanting is 3 GTX 280's in SLI and two HD 4870X2's in CFX, Trubitar did that but that was with a Skulltrail rig..
Live with not being able to max this game, or forget about Crapsis because your wasting your cash