Originally Posted by
Serious_Don
I've built machines with that exact board using Phenoms and FX 4xxx and 6xxx CPUs, it can supposedly run an 8 core at stock but I wouldn't bother. Those mosfets get quite hot under heavy load (not just synthetic but video game or rendering load) stock on a 125w TDP chip. If you really want to push it to it's limit, get matching (or close) sized heat sinks and maybe a pair of 40mm fans (if you don't mind the buzzing, they aren't so bad if you run them to a controller and dial them down a peg).
If you're in the US, check out the memory and chipset cooling section on Newegg or other similar retailers, you'll find something cheap.
That all said, don't expect a huge overclock as it is. c3 phenoms like >1.5V to get 4ghz, even if you cool that VRM it's just not going to handle it, it's way too much power. IIRC that CPU has a stock vcore of 1.425.
See how far you can push the chip on stock voltage and shoot for a modest overclock, 3.6 or 3.7ghz may be possible around 1.45v.
Last bit of advice, stress test the machine by running games and other software you intend to run with it. Don't put it through prime95 or any torture tests, not worth the risk.