I bought the 120mm heatsink, 120mm fan, and a 80mm thermoresistor fan. All of the fans are amazing. The heatsink on the lowerst level (12dba) keeps my 3700 san deigo at about 93 degrees. All of these fans cannot be heard from 2 feet away and provide the best air flow I have seen. I have used antec, vantec, and thermaltake these SilenX are the best from now on I will only use SilenX.