14cm Viper R Fan High performance 14cm fan with S-FLOW blades supplying 30% more airflow than a standard fan at the same speed. Supporting fully automatic PWM speed control, the VIPER-R uses custom design PWM IC that integrates Soft Switching Commutation (SSC) technology, provides smooth silent operation. The Viper fan creates more focused airflow providing blind-spot cooling, which makes it an ideal solution for a case or heatsink fan. HDB (Hydro Dynamic) bearings extend fan life and further enhance noise reduction. Killer Viper yellow colour makes this fan distinctive and unique. Specification Dimension 145 X 145 X 25mm Bearing HDB (Hydro Dynamic Bearing) Speed 600-1600 RPM Max airflow 109.55 CFM Sound level 7-21.7 dB(A) Max static air pressure 2.91 mm-H2O Rated voltage 12V Connector PWM-4pin Product code AK-FN073