(adsbygoogle = window.adsbygoogle || []).push({}); i have an i7 and when im playing mw3 the temp rises to 60~70 no over clocking

my fan is the stock fan of the cpu should i buy a newer and better 1?

It should really stay below 70, just to be safe... Is this a custom built PC or did you buy it from a vendor? If its custom built, it may just be due to not enough space in your case or something.

it only happens when playing mw3. i play BF3 maxed out on 65.

that damn stupid game doesnt support multi-threading i think thats the problem

Definitely. Buy something like a Noctua NH-D14, something huge and quiet.