High performance cooling fan, 140x140x25 mm, 12V, 4-pin PWM, max. 1500 RPM, max. 25.8 dB(A), 150,000 h MTTF Renowned NF-14r high-end 140x25mm round-frame 12V fan, more than 100 awards and recommendations from international computer hardware websites and magazines, hundreds of thousands of satisfied users Highly optimised low-noise design provides outstanding quietness of operation, excellent static pressure and strong airflow (CFM), round frame for air-based CPU coolers such as NH-D15 or NH-D14 1500rpm 4-pin PWM version with excellent balance of performance and quietness, supports automatic motherboard speed control (powerful airflow when required, virtually silent at idle) Streamlined redux edition: proven Noctua quality at an attractive price point, wide range of optional accessories (anti-vibration mounts, S-ATA adaptors, y-splitters, extension cables, etc.) Now available in a square frame version called NF-P14s (s for square frame) that lends itself to use in case and radiator cooling, the classic NF-P14 is a long-standing favorite among enthusiast users around the world and helped to found Noctuid's reputation as a top-tier manufacturer of quality quiet cooling components. The new redox edition reissues this award-winning model in a streamlined, accessibly priced package that has been reduced to the essential core: the NF-P14 fan. The performance-oriented top speed of the 1500rpm PWM version is ideal for high efficiency case, radiator and CPU cooling as well as other applications that require both extended performance headroom and PWM for automatic speed control.