it should be able to
i use a core 2 duo 1.86Ghz macbook air with an integrated nvidia 320m 256mb GPU. i can run on all medium at about 40~FPS. you should be ok. but dont expect anything insane!
hope this helps
P.S: any desktop GPU is better then a mobile one since heat and battery is less of a concern. you should, not will, but "should" see more performance then i have, but like i said, it not gauranteed!