"The CNPS7500-CU LED follows in the footsteps of Zalman's famed 'flower' heatsink technology, and just like its predecessors provides low noise cooling. Where a 90mm fan was used on the CNPS7000-series, the 848 gram CNPS7500-CU LED has a 25x105x105mm fan spinning at 1150-2300RPM. While abundant amounts of copper have always been looked upon favorably in heatsink, it does push the CNPS7500-Cu LED pretty close to 1 Kilo. The fan is internally illuminated with a couple of blue LEDs for visual effect.
In typical Zalman fashion, the CNPS7500-Cu LED is a low noise heatsink that can be made even quieter with the use of the included Zalman FanMate 2 fan speed controller."