Amazon.com: ITROLLE 4-Pin Molex to 3-Pin / 4 Pin Fan Power Cable Adapter Connector 2x12V / 2x5V Computer Cooling Fan Splitter Y Power Cables for CPU PC Case Fan : Electronics
Amazon.com: Electop 2 Pack 3 Pin ATX Fan to 4 Pin Molex Connector Cable Fan Power Adapter Cable : Electronics
Molex to 3Pin/4Pin Fan Adapter, 12V PC Fan Adapter 4Pin Molex to 4 PWM Splitter Sleeved Braided Cable UIInosoo for 3 Pin or 4 Pin Computer PC Case Fan Power Supply 11 inch