"As you might expect, the Akasa AK-876 is a lower noise AMD processor heatsink that is both easy to install and fairly lightweight. A thermally controlled fan was abandoned for a PWM compliant one instead, which makes sense as it's better to allow the computer direct control over impeller speed anyhow.
Akasa's AK-876 heatsink utilizes three "U" shaped copper heatpipes to connect a compact copper base block with widely spaced aluminum fins."
FULL STORY @ FROSTYTECH (http://www.frostytech.com/articleview.cfm?articleID=2138)
