NZXT Fluid Bearing Fans@ TechwareLabs
 

Today we'll be looking at the NZXT FX120LB and the FX140LB, case fans that work around a "fluid dynamic bearing" system. Since the bearings in a fan's motor are often the biggest source of noise at low speeds, this new design has the potential to produce a much quieter fan without sacrificing performance.

http://www.techwarelabs.com/nzxt-fluid-bearing-fans/