FrostyTech posted a review on the Zalman CNPS10X Performa Heatsink

Zalman's CNPS10X Performa heatsink is standard in most other respects, especially to anyone familiar with the CNPS10X-series. It's equipped with a 120mm PWM fan that ranges in speed from 900RPM to 1350RPM with the RC24P PWM-resistor attached, 2000RPM under full power. The 153mm tall CNPS10X Performa weighs in at 748 grams and installs onto Intel socket 775/1156 and 1366 processors.

Zalman CNPS10X Performa Heatsink Review