Gelid's Silent Spirit heatsink makes use of four rubber vibration absorbing posts to hold a 100mm PWM fan in place, the fan itself varies in speed from 2400RPM to 900RPM. Weighing in at 370 grams, the Silent Spirit is pretty light, even though it uses four 6mm diameter copper heatpipes to connect a stacked aluminum fin array to a copper base. The aluminum fins have a dimpled surface texture, and alternating fin heights to further break up the surface below the fan.



Link: Frostytech