Low Motor Temperature - 4 x Life Span: 10 C lower motor temperature doubles the life span. The BioniX gaming fans have a four times longer service life through low coil temperature. Therefore, we extend the warranty to 10 years. Silent 3-Phase Motor: Extremely silent operation through 3-phase motor guarantees long gaming sessions without annoying noise. 200 to 1800 RPM: With a wide range of regulation and the PWM Sharing Technology (PST), the BioniX F140 fan speed can be controlled synchronously with all your other fans together and thus keep the noise at a minimum while guaranteeing maximum cooling performance when needed. Optimised Fan Design: We further optimised the fan blade design to get a higher airflow at lower noise generation. This guarantees high pressure and highly efficient ventilation for your gaming case. Enhanced Bearing: Due to a new alloy/lubricant combination developed in Germany, the friction within the bearing is reduced and a greater efficiency is achieved. This way, there is less heat development as well as less bearing noise and you can enjoy a longer service life of your cooler.