The classic NF-B9 is a long-standing favourite among enthusiast users around the world and has helped to found Noctua\'s reputation as a top-tier manufacturer of premium quality quiet cooling components. The new Redux edition reissues this award-winning model in a streamlined, accessibly priced package that has been reduced to the essential core: the NF-B9 premium fan. Its industry grade SSO bearing, over 150.000 hours MTBF rating and full 6 years manufacturer\'s warranty make the NF-B9 redux a proven premium choice that provides trusted Noctua quality at an attractive price point. The 1600rpm PWM version features Noctua\'s proprietary NE-FD1 PWM IC for automatic speed control, which strikes a perfect balance between high cooling capacity and low noise operation in each given situation.Features: - Proven NF-B9 PWM Design- Streamlined redux edition- Vortex-Control Notches- Bevelled Blade Tips- Six year manufacturer\'s warrantySpecifications:- Size: 92x92x25 mm- Connector: 4-pin PWM- Bearing: SSO- Rotational Speed (10%): 1600 RPM- Min. Rotational Speed (PWM, +/-20%) 350 RPM- Airflow: 37.8 CFM- Acoustical Noise: 17.6 dB(A)- Static Pressure: 1.61 mm H2O- Max. Input Power: 0.96 W- Max. Input Current: 0.08 A- Voltage: 12 V- MTBF: > 150.000 h- Accessories: Four Fan Screws