Overclocking n00b - How do I do it and what cooling will I need?

Hi folks, I've been sat on an i5 2500k (3.3GHz) for a couple of years now. I bought it with the intention of overclocking, but somehow never quite got around to it. As I recently added a 4GB GTX 770 to my rig, I figure now's probably a good time to crank up the CPU too.

So, what's the easiest way to get a stable overclock? I don't need anything crazy, 4GHz would probably suffice, if I can go to 4.4 or 4.5 without any real risk or stability problems that'd be even nicer, but no need to go beyond that.

Also, what cooling will I need? I live in southern England (soon moving to south Wales) so ambient temperature is typically below 20°c, perhaps occasionally getting into the low 30's in the summer, but hey, who the hell's indoors on their computer on a day like that? I currently have an Arctic Freezer 7 Pro Rev 2 CPU cooler, a 120mm Antec TruQuiet intake at the front, a 120mm Antec TriCool exhausting out the back and a 140mm Antec TriCool exhausting out of the top, so nothing special. My case has space for an extra 120mm at the front and on the side.
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  1. Best answer
    its really just raising the core multiplier and then the core voltage for stability,
    the best thing to do is read about it here is a guide to overclocking your cpu
    and you will find useful information in here as to what stable results others have had,
    your cooler might not be the best performer for a very high overclock but im sure you will get a decent bump in performance with it
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