Thank you 'jjb8675309', 25fps is more like minimum average because it sometimes drop to 20fps. Normal is 30fps or even higher. I agree that it is not the best experience but i was more interested how will my rig perform on everything maxed out. So now i have decided to drop from hardcore graphic details to advanced (medium?) and now it runs around 50fps average (max above 65fps, and minimum above 35fps) much better and graphic still looks awesome!
'wolfram23' yes i agree with you. I heard that Crysis 2 is optimized for 8 cores or 16 threads or even more (correct me if am wrong, i don't remember exactly for how much) and i have seen a total utilization of my 2 cores at 100% constant usage. Crysis 2 has better optimization of game engine than original Crysis.
I will postpone upgrade of my pc for now, but when i decide, i will buy a faster quad cpu and a new or used GeForce 460 or 560 card...