So I recently bought a 15" 2.2ghz i7 mbp (late 2011). It's my first mac, and my only problem with this bad boy is that every 5 seconds it will hiccup while playing starcraft 2. I tried playing on the reccomended settings (mostly ultra), and it was almost unplayable; it stuttered the entire game with a big hiccup every 5 seconds. I tried on all high settings, and it was a little better, but the hiccup was still there every few seconds. Does anyone know how to fix this?