Gamespot has done some performance test on various gaming machines ranging in specs. At the highest end machine, it was able to do about 141 FPS while the lowest was a meager 21 FPS. If you are running CoD: MW2 on a PC, this is a pretty good indicator of where your system may level off.

We put together a few sample systems to show how the game performed using real-world computers. Our slowest machine and the absolute minimum required to run the game, a 3.2GHz Pentium 4 paired with a GeForce 6800, struggled to churn out a barely playable experience at rock-bottom image-quality settings. Our mid-range system, outfitted with a 2.66GHz Core 2 Duo and a Radeon HD 5770, pumped out a more than playable experience with every setting on and a resolution of 1920×1200. The behemoth system, a Core i7-960 paired with the Radeon HD 5970, literally doubled the performance of our midrange sytem. The behemoth is entirely overkill for Modern Warfare 2.