I suppose if your card could actually draw that fast then it could. Most games can use a command like com_Maxfps 1000 then if it can draw that quick it'll go up that high....just stare at a completely black wall and you should be able to hit it
hehe I can see the posting of screenshots now. 'Yeah b!tch look at my sweet 1000FPS against that black wall....WHAT NOW!?!' 'ATI vs Nvidia....who can draw the most blank frames per second?'