EDIT: Added OC benches Crysis/WH
Did a little OC.
Core I7 4200MHZ
Crysis Warhead 1920x1080 Enthusiast 0,2x,4x,8x
Crysis 1920x1080 VeryHigh 0,2x,4x,8x
Crysis Warhead 1920x1200 Enthusiast Avalanche 0AA
Still room to OC for higher FPS.
Link to bigger pic
EDIT:1920x1200 all AA that can be done by ATI card with Crysis.