Thermaltake's Silent 775 Heatsink
 

Today we take a look at one of the first aftermarket heatsink/fan combos available to cool Intel's Prescott CPU
from Thermaltake, their Silent 775. To keep this beast quiet, Thermaltake has opted to use heatpipe technology along with
their funneled 90x90x25mm fan that centralizes airflow and provides high air pressure and better cooling.

http://www.techtastic.ca/reviews4/silent775.html