A quick overview of frame rates. Tested on a system with 4GB Ram, Athlon II 240 clocked at 3.5GHZ.
Considering the CPU is fairly weak, the framerates are impressive at full 1080p.
GTA IV - badly coded game, not optimised at all. All settings on high. View distance set to 40. Traffic set to 35. While on foot, average of 35fps. While driving, average of 25fps.
But can it run Crysis? Yes! Yes it can. Everything set to very high, AA at x4. Average of 43 fps.
Unfortunately I became absorbed in games, so haven't tested other games yet.
I can confidently recommend this card as a 1080p card that will not disappoint. Well worth the money.