![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
![Can I run Noctua 3-pin fans on 4-pin PWM connectors or 4-pin fans on 3-pin connectors? : Noctua Knowledge Centre Can I run Noctua 3-pin fans on 4-pin PWM connectors or 4-pin fans on 3-pin connectors? : Noctua Knowledge Centre](https://s3-eu-central-1.amazonaws.com/euc-cdn.freshdesk.com/data/helpdesk/attachments/production/101113000666/original/yprDOft-IvnICEu50WjeEeFjkwUZRdZMeA.png?1696429263)
Can I run Noctua 3-pin fans on 4-pin PWM connectors or 4-pin fans on 3-pin connectors? : Noctua Knowledge Centre
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Amazon.com: ThreeBulls PWM Fan Hub , PC CPU Cooling 4 PIN/3PIN Power Cable Hub Splitter Adapter Sleeved Case for 12V Desktop Computer Cooler Fans 1 to 5 Way (15.7 Inch) : Electronics
![43000000 8in 12V PC Case Fan Power Adapter Cable, 3 Pin or 4 Pin PWM C – AMT | Computers & Electronics 43000000 8in 12V PC Case Fan Power Adapter Cable, 3 Pin or 4 Pin PWM C – AMT | Computers & Electronics](http://amt1st.com/cdn/shop/products/splitter_1200x1200.jpg?v=1586405321)