CRYSIS 2 Multiplayer demo(CRASH SITE) on nvidia gtx260(core 216)

game runs fine with an average of 45fps SKYLINE map gameplay -CRASH SITE mode Rig info: mobo-asus striker II FORMULA, CPU-core 2 quad q6600 2,4Ghs,overclocked at 2,66 Ram-4Gbyte CORSAIR 1066Mhs, GPU:Palit gtx 260-core 216 SSD(windows drive):Kingston SNV425 64gb hard drive:Western Digital Caviar Black 640GB HDD(7200.10) cooler master CM STORM Scout case power suplly:AEROCOOL Horse power 650w SLI LG FLATRON M227WD full HD 22' monitor LOGITECH 5.1 speakers(70w-140w) Cooler Master N520 CPU Cooler windows 7 Ultimate 64bit