High performance cooling fan, 140x140x25 mm, 12V, 4-pin PWM, max. 1500 RPM, max. 25.8 dB(A), >150,000 h MTTF Renowned NF-P14s high-end 140x25mm 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), square frame for water cooling radiators and chassis ventilation 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.)