FAQ: Can I run 4-pin PWM fans on 3-pin fan headers?
10pcs PC Cooling Fan 4 Pin to 3pin/4pin PWM Connector Extension Power Cable | eBay
1PC 4 Pin to 3 Pin Fan Power Cable Adapter Connector 12V*2 7v 5v Computer Cooling Fan Cables for CPU PC Case 12.5cm|Computer Cables & Connectors| - AliExpress
Will my 3 pin fan connect to a 4 pin fan hub? - Quora
3 Pin GPU Mini Fan Connector to 2 x Standard 4 Pin PWM Adapter Cable - modDIY.com
Micro 3-pin Fan Connector for RPM Fans with Pins CON-MICRO-3PIN
How to connect a 3 pin or 4 pin fan to the motherboard | Cooler Master FAQ
3/4-Pin Fan Connector (Male) to 4-Pin GPU Mini Fan Connector (Female) - All Black (CAB152) - Newegg.com
ExtremeMod 4 Pin Molex to 2 x 3 Pin Male Computer Case Fan Power Connector Y-Splitter Adapter Cable : Electronics
4 Pin Molex IDE to 3 Pin CPU Chasis Case Fan Power Connector Cable Adapter 12 for sale online | eBay
3-pin Fan Power Male to 4-pin Molex Male Cable, for Computer Fan, 6inch - PI Manufacturing
5/10pcs 4 Pin for Molex to 3 Pin fan Power Cable Adapter Connector 12v*2 / 5v*2 Computer Cooling Fan Cable for CPU PC Fan cable|Computer Cables & Connectors| - AliExpress