SILENT WINGS 3 140MM PWM HIGH-SPEED NO COMPROMISE SILENCE AND PERFORMANCE be 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. Great performance-to-noise ratio with 28.1dB(A) at 1,600rpm 6-pole fan motor for less power consumption and vibration Fluid-dynamic bearing enables super-long life span of 300,000 hours Fan frame with funnel-shaped air inlets for extremely high air pressure Seven fan blades provide optimized airflow PWM controlled fan speed by the motherboard German product conception, design and quality control Three years manufacturer’s warranty model : be quiet! Silent Wings 3 140mm 4-Pin PWM High-Speed Fan Speed: 1 tag : Case Fans