"The Zalman CNPS9500 LED heatsink is compatible with all current AMD and Intel socket formfactors (including Sockets 775, 478, 939, 940, 754), and weighs in at roughly 530grams. The heatsink is voluminous, but designed to operate quietly and cool under low noise, low fan-speed conditions.
As a heatsink, the Zalman CNPS9500 LED functions best as a low noise cooler. With that translucent 92mm fan glowing blue and spinning at 1350RPM, the heatsink maintains good temperatures and excellent noise reduction.
In the inventory of K8 heatsinks FrostyTech has thus tested, nothing comes close to the CNPS9500 LED's noise level at that temperature range."