AMD Athlon64 X2 5000+ Black Edition Review
 

All in all I'd say AMD has a sure hit with the X2 5000+ Black Edition Processor. It does amazing speeds for its price, and manages to stay nice and cool when running them. If you're just looking to get into overclocking, then this would be a good place to start, as the unlocked multiplier makes setting the speed beyond easy. Of course, if you don't have any technical knowledge, this probably isn't the processor for you. You'll be able to spend a bit more and get a processor right out of the box running at these speeds, and not have to worry about overclocking. If you're an overclocker, check this one out, with its price and speeds you won't be sorry.

http://www.gamepyre.com/hardwared.html?aid=901&p=1