If you've been looking across the Web for ways to improve the game's performance, you might have come across two commands in particular (r_applypicmips and r_multigpu) that people have had some success using. We contacted some of the developers at Infinity Ward to see if these commands actually help, and this is what they had to say with respect to the two commands.
r_applypicmips: "This basically gets the drivers to reload the textures. It doesn't make the game faster on our machines, but it is theoretically possible. Nvidia released a new driver that they said makes COD2 faster--so maybe this was related."
r_multigpu: "When used with single GPU cards, this will increase the FPS number. But it will introduce the "mouse lag" that many D3D games have. Basically, the driver will buffer up several frames to give an artificially high FPS count, at the expense of responsiveness (because what is drawn to the screen may be three frames behind "now")."
Πηγή:
http://www.gamespot.com/features/6140517/p-2.html
