AMD Phenom 9600 Black Edition
 

The Phenom line of CPUs has the potential to be a great performer. Unfortunately, problems with getting the chips to run at a high enough clock speed means they can't compete with Intel at the top end. So, if you're planning on a full system upgrade, we'd recommend going with an Intel chip.

If you've already got an AM2 motherboard and some decent DDR2 RAM and you just want a CPU upgrade then dropping £150 for a Phenom 9600 Black Edition will get you a nice boost in performance. However, we'd probably still recommend you wait for the next line of Phenoms, which should clock higher, to be released.

http://www.trustedreviews.com/cpu-me...ack-Edition/p1