AMD Phenom II Efficiency and Cooler Selection
 

As we have already found out, Phenom II has relatively low requirements to a motherboard and a PSU, so moderate overclocking requires no extra expenses. However, it will be good to find out how many Watts this "moderate" implies for real applications. And also what cooler is sufficient for low-noise cooling.

http://ixbtlabs.com/articles3/cpu/phenom-2-cnq-p1.html