if you do a little searching, or even browsing, you'll find other threads about this. from what i can tell, it's not too easy to do (harder than it was for old athlons), but it can be done... i remember seeing a link to a video tutorial... just look around on here, you'll find it. the max you'll be able to get depends on the chip. as far as hsf goes, i like the thermalright ax-7, fan depends on your cooling/noise preferences. another option to look into the crazypc.com's mod of the thermoengine hs. i considered it for a while after reading a couple reviews of it--should be good for your needs. personally i went with the ax-7... i'm sure others will have other opinions. peace.
-david