![are all 3 pin fans running at (5v) and all 4 pin fans running at (12v)? If so, why is a 3 pin fan able to connect to a 4 pin header are all 3 pin fans running at (5v) and all 4 pin fans running at (12v)? If so, why is a 3 pin fan able to connect to a 4 pin header](https://preview.redd.it/are-all-3-pin-fans-running-at-5v-and-all-4-pin-fans-running-v0-eq5o5vbas70b1.jpeg?width=602&format=pjpg&auto=webp&s=06d61a3991e72f3b38f5ded69f5dcb36a52ab11d)
are all 3 pin fans running at (5v) and all 4 pin fans running at (12v)? If so, why is a 3 pin fan able to connect to a 4 pin header
![mosfet - How can I adapt a 3-pin PC fan connector to a 4-pin connector? - Electrical Engineering Stack Exchange mosfet - How can I adapt a 3-pin PC fan connector to a 4-pin connector? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/T3muo.png)
mosfet - How can I adapt a 3-pin PC fan connector to a 4-pin connector? - Electrical Engineering Stack Exchange
![Amazon.com: PNGKNYOCN 3-Pin Fan to 4-Pin Molex Pass-Through Power Adapter Cable, 4-pin Molex/IDE to 3 Pin CPU Fan Power Cable(2-Pack) : Electronics Amazon.com: PNGKNYOCN 3-Pin Fan to 4-Pin Molex Pass-Through Power Adapter Cable, 4-pin Molex/IDE to 3 Pin CPU Fan Power Cable(2-Pack) : Electronics](https://m.media-amazon.com/images/I/61TyTj-0aXL.jpg)
Amazon.com: PNGKNYOCN 3-Pin Fan to 4-Pin Molex Pass-Through Power Adapter Cable, 4-pin Molex/IDE to 3 Pin CPU Fan Power Cable(2-Pack) : Electronics
![Techinal 5V 3 Pin 4 Pin ARGB RGBW Cable Splitter Hub Case Tape Extension Cable Adapter LED Strip Light PC RGB Fan Cooler - Walmart.com Techinal 5V 3 Pin 4 Pin ARGB RGBW Cable Splitter Hub Case Tape Extension Cable Adapter LED Strip Light PC RGB Fan Cooler - Walmart.com](https://i5.walmartimages.com/asr/9969540d-60f3-4727-86cc-c66b827b80be.76c1b2fdf4cdcd5d2d30bb8e7cb658fe.jpeg?odnHeight=768&odnWidth=768&odnBg=FFFFFF)