Change the 3/4Pin to DC interface power supply Use a Variety of DC Power Supplies to Control Desired
Fan Speed (for Example: 5V for Silent, 12V for
Full Speed) Input: Female 5.5 mm OD x 2.1 mm ID DC Plug
Socket Output: 3/4-Pin Male Fan Connector (Specialized Fan Connector Is Compatible With Both 3-Pin And 4-Pin Fans)
Cable Length (Excluding Connectors): 11.8" / 30cm