So this is a Samsung laptop, i5-2450M @2.5 GHz - stock - with up to 3.2 on turbo boost, or something.
I have had this laptop for close to 3 years, and in the last 1-2 months, game performance started to get real bad, horrible FPS drops and whatnot.
Turns out my CPU is running at ~70ºC AT IDLE...