,b>No Compromise Silence and Performancebe quiet! SilentWings 3 140mm PWM high-speed stands for state of the art technology and virtually inaudible operation. The extremely high air pressure produced makes it a perfect choice for powerful water- and air-cooled systems.SilentWings 3 PWM high-speed fans are your best choice for any application that requires the ultimate in quiet operation and uncompromised performance.Features:- Great performance-to-noise ratio with 28.1dB(A) at 1,600rpm- 6-pole fan motor with three phases giving very low power consumption and less vibration- Advanced fluid-dynamic bearing enables super-long life span up to 300,000h - Rubberized fan frame with funnel-shaped air inlets for extremely high air pressure - Seven fan blades with optimized surface structures ensure excellent airflow - Removable anti-vibration mountings reduce transmission of vibrations - PWM controlled fan speed by the motherboard - German product conception, design and quality control - Three years manufacturers warrantySpecification:- Dimensions (L x W x D), (mm): 140 x 140 x 25 - Fan speed @ 12V 100% (rpm): 1,600- Airflow @ 12V (cfm, m3/h): 77.57 / 131.79- Air pressure @ 12V (mm H2O): 2.16- Noise level @ 12V 100% (dB(A)): 28.1