Why does phenom perform better than an intel quad at high resolution in Lost Planet?

[Devil's Prophet]

And please do not tell me about low to medium game settings without AA/AF, because most people do not play games at low, and surely not me.

I do, because my Intel GMA900 is too weak to play at anything better than lowest settings. At least in more recent games like HL2. I mostly enjoy my oldies at max res/settings, but's because they are REALLY old.

Maybe next year I'll be doing some gaming on my main rig again instead on my weak but very cool laptop.