FrostyTech posted a review on the Apack Zerotherm CF800 Socket 775 Heatsink

The Apack Zerotherm CF800 heatsink is a compact aluminum finned socket 775 cooler. It has been designed to operate quietly, with the ability to scale the speed of its translucent fan automatically and tackle heat loads as high as 130W. That makes this 357 gram lightweight heatsink an ideal candidate for socket 775 Intel Pentium D/Core 2 Duo processors. The CF800 heatsink has a thermally responsive fan that adjusts its speed between 800-2300RPM, blowing upwards of 42CFM over over 2300mm2 of cooling surface area.

Apack Zerotherm CF800 Socket 775 Heatsink Review