I have done this and it has made my game run smoothly!
Go to Nvidia Control Panel
Program Settings, Select iw6mp64_ship.exe
FXAA - OFF
AA Gamma Correction - OFF
Max Pre-Rendered Frames - 1
Multi Display - Single Display Performance Mode
Power Management - Prefer Max Performance
Threaded Optimization - ON
Vertical Sync - ON
Hope it works for you like it did for me! Cheers!