Although not specifically laptop related, here's what you're looking at, the memory specs of the graphics card. For a very good graphics card for your wants I'd say look to the NVidia GTX 750Ti. There are graphics cards a whole lot less expensive (down to $50) that meet those specs but IMO, the 750Ti compliments your build nicely (shouldn't overwhelm your CPU).
As far a reaching 60fps, that depends also upon the resolution of your display and a few other factors not addressed here (I would expect 60fps though)