For some reason Crysis only work in the level "Paradise Lost" with Sli enable
the rest of the game I'm getting like 7-12 fps and has never went any higher but in "paradise Lost" im getting anywhere from 19-40 fps avg at 25 fps
Have already try running any drivers available
Currently running at
patch 1.2
geForce 174.12
Setting:
Rez 1920x1080  
all high except "object' and "post processes" on Mid
the game run smooth as a baby bottom until I look at any kind of "green Vegetation"    
it's working at the opposite because i heard the game perform better in the tropical than snow environment.
I searched all over the net for any one who have this problem but came up with no solution
any help would be greatly appreciated.
thank in advance.
 
full spec
 
Phenom Black @ 2.5Ghz
ASUS CROSSHAIR AM2 NVIDIA nForce 590 SLI
4GB (4x1GB) RAM Dual Channel
A-DATA 2GB (2x1GB) DDR2 SDRAM DDR2 800
Kingston 2GB (2x1GB) DDR2 SDRAM DDR2 667
x2 GeForce 8800GTS 512MB in SLi Mode OC 799/1996/1022
Rosewill RX850-S-B ATX12V v2.2 & EPS12V v2.91 850W Power Supply
x2 Western Digital Caviar SE16 WD2500AAKS 200GB 7200 RPM in RAID 0
Window Vista Ultimate x64
Window XP Professional x64