The Cooler Master Silencio FP 120 PWM Performance Edition fan is the latest in whisper-quiet cooling performance, encompassing the latest in CM Smart Technology. The Silent Driver IC provides a smoother, less torque impulse for an ultra-low noise and minimal vibrations from the beginning to the end. Smart Fan Engine that generates 25% more air pressure from the blade. Longevity is no problem for the Silencio fan as it utilizes Cooler Master's latest Loop Dynamic Bearing (LOB) technology the highest dustproof level of IP6X for a long-lasting slient cooling performance fan for computer cases, CPU coolers, and radiators.