Spire X2 120mm PWM Fan Review @ Hi Tech Legion
 

The Spire X2 120mm PWM fan runs between 600 and 1500 RPM and is practically inaudible with noise levels between 10 and 22 dBA. The X2 120mm fan is capable of pushing 62.53 CFM at 1500 RPM while producing 1.74mm H2O of static air pressure. To further reduce noise levels the X2 features removable silicone rubber pads on each of the screw holes. Using their Nano Tech Bearing technology they can increase the fan blade size and achieve a MTBF of 70,000 hours. The X2 120mm PWM fan features four blue LEDS. In addition red LED lighting and 140mm, 92mm, and 80mm sizes are available.

http://www.hitechlegion.com/reviews/...spire-x2-120mm