• user can switch the mode between PWM & V.R. (Variable Regulation – To manually control the fan speed) by sliding the switch on PCI bracket.
• This switch can be attached into any empty PCI Slot
• By reducing the dimension of the center hub and enlarging the blade surface area, high airflow is generated at a low RPM

Please note:

• In Order to take advantage of PWM function, please use a motherboard with PWM features build-in.
• PWM function will not work if the fan is connected via 4 Pin peripheral connector or connected to 3-Pin fan port. In this case, the fan will spin at the maximum speed.
• Connection to any third party market fan controller with 3-Pin port, PWM function will not work but fan speed can be adjusted by the fan controller.