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Amazon.com: ExtremeMod 4 Pin Molex to 2 x 3 Pin Male Computer Case Fan Power Connector Y-Splitter Adapter Cable : Electronics
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4-Pin Case Fan Power Splitter Computer Multi CPU Fan Connector PWM Extension Cable Adapter, Compatiable with 3-pin / 4-pin Fans : Amazon.ca: Electronics
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mosfet - How can I adapt a 3-pin PC fan connector to a 4-pin connector? - Electrical Engineering Stack Exchange
![SOLVED] - CPU Fan's ultra speed, is it because I plugged the 5 pin slots to 4 pin header? | Tom's Hardware Forum SOLVED] - CPU Fan's ultra speed, is it because I plugged the 5 pin slots to 4 pin header? | Tom's Hardware Forum](https://forums.tomshardware.com/proxy.php?image=https%3A%2F%2Fi.postimg.cc%2FL4tZRtCC%2FDELLFANWIRES.png&hash=6c273f43e652defc5e90bc3a0e877775)