what is the acceptable FPS to play this game ?
To play anygame at least 30 fps.
But that of course depends on the specs on the computer, and net.
Well network dont have a thing to do with that, but the hardware he is using yes, if its on-board GPU then he will have trouble, and if its Intel 4000 the game dont work on it. But i think any GTS or GT (and similar from Radeon Series) would work fine.