ROG Strix XF120 Whisper-quiet, 4-pin PWM fan for PC cases, radiators or CPU coolers Optimal mix of airflow and static pressure: Can be used as a fan for PC cases, radiators or CPU coolers MagLev bearings: Stabilizes the rotor for less friction and less noise. Offers a lifespan of 400,000 hours Minimal acoustic profile: Whisper-quiet cooling performance at 22.5dB (A), tuned to a balanced and stable audio frequency aerodynamic fan blade and housing design: minimizes air turbulence and maximizes airflow Extensive operating range: 250 - 1800 rpm for more flexibility and to generate a quiet fan curve (fan is regulated down at 0% PWM load) Vibration-dampening pads and brackets: Reduces vibrations and prevents rattlin model : Asus ROG Strix XF 120 - Universal Fan 12 cm tag : Case Fans