WR2 is correct though - the 4650 does not do well on Crysis - especially at 1920x1080.
The link below is a review showing its performance compared to some other cards. Note that it is only the 512MB card so yours has more memory. Also I did not see what settings they were using for Crysis. You might be interested in the other pages showing other games - there is a page selection tab on bottom.http://www.legitreviews.com/article/792/4/
It shows 10.5 FPS for Crysis. Also many of these cards are slightly OC so you might also want to compare your card to the tested one.