Thermalright SI-120 Heatsink
 

"The heatpipes pass through the center of the fins and are soldered in place. A total of 52 fins provide for a large surface area for cooling. As with Thermalright's other coolers, the finned portion of the heatsink overhangs the base by a good margin and should provide indirect cooling for components surrounding the CPU socket."

Direct Link: http://www.ocia.net/reviews/si120/page1.shtml

a good review, especiallly becuase of the different heatlevels, really shows the worth of the SI-120 for overclocking

only thing they should mention is that a 90mm fan at 4000 RPM is a lot more annoying than a 120mm at 2500 :)

SI is ~1°C better than XP FYI, so not worth the upgrade if you already have it