Chassis Fan Hub CPU Cooling HUB 10 Port 12V 3Pin/4 Pin Fan PWM Fan Hub Controller power from SATA Interface Designed for 12V 3/4 Pin FAN, support simultaneous starting of 10 channel 4Pin fans, solving the problem of shortage of motherboard Support PWM function fan automatic speed regulation. PWM interface is connected to CPU FAN interface on motherboard by PWM cable. The white interface is the dedicated interface only for CPU fan, these Screw hole design for fixing the hub in the chassis