High performance cooling fan?? 80x80x25mm?? 12V?? 3-pin Molex?? 1800 RPM?? 17.1 dB (A) ?? >150??000 h MTTFRenowned NF-R8 high-end 80x25mm 12V fan?? more than 100 awards and recommendations from international computer hardware websites and magazines?? hundreds of thousands of satisfied usersHighly optimised low-noise design with outstanding quietness of operation?? static pressure and airflow (CFM) ?? ideal for chassis ventilation?? cooling fan replacement for NAS and other devices?? etc. 1800rpm 3-pin version with excellent balance of performance and quietness?? speed can be controlled with optional NA-SRC10 Low-Noise Adaptors or by reducing voltageStreamlined 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. )