Corsair ML-series fans promise long life and low noise
 

Corsair is bringing out a new series of case fans using magnetic-levitation bearings. The fancy bearings claim to reduce friction between the blades and the rotor hub to almost nothing, which could eliminate bearing noise and drastically prolong the life of the fan compared to typical sleeve or ball bearings. The ML series fans include 120-mm and 140-mm models, which come in basic or Pro varieties. While the fan motors and blades are unchanged, the ML Pro fans include rubber corners to dampen vibration. They're also available with red, white, or blue LED lighting.

http://techreport.com/news/30372/cor...-and-low-noise