*GTA IV - Grand Theft Auto (2008)
low med. high
*AMD Radeon HD 6750M 65 62 32
GTAIV on a 9400M? That's a joke! I tried that and you get around 15-05fps at 1280*720 with everything on lowest (and I was using an overclocked 9400M with the latest drivers).
But yeah it will work. I was playing it on my 6970M iMac earlier today. It doesn't run great though. Even on this card you have to turn the settings down to get a smooth 60fps and it stutters and slows down at the most inappropriate times.
(27" iMac running it at 1920*1080)