No. It's definitely an NVIDIA coded game.
Also the only way the GTX 580 gets 40-50fps in Crysis is if you crank it up to 2560x1600 and/or have a CPU bottleneck. Check any reputable GTX 580 review.
Last time I checked Crysis was all about GPU.
Edited by Stefy - 6/5/11 at 3:23pm