The BioniX F140 has the best airflow to noise ratio. Guarantees extreme silence with it's 3-phase motor even for extended sessions of use. With a wide range of 200 to 1800 RPM, the BioniX F140 is controllable with PWM to regulate the fan speed as needed. The optimized fan blade design ensures high pressure and high ventilation for your gaming case to get a higher airflow at lower noise generation. The 3-phase motor with low coil temperature increases the life span up to fourfold and we extend the warranty to 10 years.