When it comes free of charge, it may not be bad or an underperformer. The new and improved heatsink from AMD retail pack 165 Opteron (and X2 A64) comes with 4 heat pipes, topped with 80 x 20mm delta fan with built in temp sensor that will reach 5,200 rpm when it is called for the tough job(s), yet runs quietly during light duty even at 800Mhz overclocked speed. In this review it's compared to the popular Thermalright XP-90.

Sorry Guy's the link is now fixed