Thermaltake Sonic Tower air cooler heatsink
 

First off we must say in this review that the Thermaltake Big Typhoon has a very quiet fan. At the lower fan speeds of 7.5 & 9 volts we could hardly hear it running. Also the fan we used with this Thermalright is a very basic low powered computer case fan.

at: http://www.a1-electronics.net/Heatsi...ic-T_Apr.shtml