![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
![Eng] How to Run CPU fan on 12v battery | 3 wire to 2 wire Cooling fan Mod, Pinout, Reverse Polarity - YouTube Eng] How to Run CPU fan on 12v battery | 3 wire to 2 wire Cooling fan Mod, Pinout, Reverse Polarity - YouTube](https://i.ytimg.com/vi/sF-NxTRtqZg/maxresdefault.jpg)
Eng] How to Run CPU fan on 12v battery | 3 wire to 2 wire Cooling fan Mod, Pinout, Reverse Polarity - YouTube
![hardware - How can I connect this 3-pin Slot 1 CPU fan to my system that uses a 2-pin connector? - Retrocomputing Stack Exchange hardware - How can I connect this 3-pin Slot 1 CPU fan to my system that uses a 2-pin connector? - Retrocomputing Stack Exchange](https://i.stack.imgur.com/nakXw.jpg)
hardware - How can I connect this 3-pin Slot 1 CPU fan to my system that uses a 2-pin connector? - Retrocomputing Stack Exchange
![Sleeved PWM Fan Hub Splitter w/ LED RGB Lights Switch,Motherboard CPU Fan 4 Pin to 4 5 Way Adapter Cable for 4-Pin & 3-pin Fan Sleeved PWM Fan Hub Splitter w/ LED RGB Lights Switch,Motherboard CPU Fan 4 Pin to 4 5 Way Adapter Cable for 4-Pin & 3-pin Fan](https://ae01.alicdn.com/kf/Hb63432a471d64d3b9905f5ed32db4b58a.jpg_640x640q90.jpg)
Sleeved PWM Fan Hub Splitter w/ LED RGB Lights Switch,Motherboard CPU Fan 4 Pin to 4 5 Way Adapter Cable for 4-Pin & 3-pin Fan
![ZLKSKER 4 Pin PWM Fan Hub, PC Internal Fan Power Supply Extension Cable (13-Inch, 24AWG), 4 Pin & 3 Pin CPU Cooler Cooling Fan 1 to 5 Splitter 5 Way Adapter: Amazon.co.uk: Computers & Accessories ZLKSKER 4 Pin PWM Fan Hub, PC Internal Fan Power Supply Extension Cable (13-Inch, 24AWG), 4 Pin & 3 Pin CPU Cooler Cooling Fan 1 to 5 Splitter 5 Way Adapter: Amazon.co.uk: Computers & Accessories](https://m.media-amazon.com/images/I/61yH-w9e7KL.jpg)
ZLKSKER 4 Pin PWM Fan Hub, PC Internal Fan Power Supply Extension Cable (13-Inch, 24AWG), 4 Pin & 3 Pin CPU Cooler Cooling Fan 1 to 5 Splitter 5 Way Adapter: Amazon.co.uk: Computers & Accessories
![If a fan splitter has 3-pin and 4-pin cables, will the 3-pin fans always be running at 100%? : r/computers If a fan splitter has 3-pin and 4-pin cables, will the 3-pin fans always be running at 100%? : r/computers](https://preview.redd.it/if-a-fan-splitter-has-3-pin-and-4-pin-cables-will-the-3-pin-v0-whp5ey9rv7ca1.jpg?width=1080&crop=smart&auto=webp&s=dd2ded8e0b0e5c0351f86738181089b0c6cacb97)
If a fan splitter has 3-pin and 4-pin cables, will the 3-pin fans always be running at 100%? : r/computers
![4-Pin Computer CPU Fan Hub, PC CPU Cooling 4 PIN/3PIN Fan Power Cable Hub Multi Splitter Connector Cable Adapte for 12V Desktop Computer Cooler Case Fans 15 Inch: Amazon.co.uk: Computers & Accessories 4-Pin Computer CPU Fan Hub, PC CPU Cooling 4 PIN/3PIN Fan Power Cable Hub Multi Splitter Connector Cable Adapte for 12V Desktop Computer Cooler Case Fans 15 Inch: Amazon.co.uk: Computers & Accessories](https://m.media-amazon.com/images/I/71JUt2QpyxL._AC_UF350,350_QL80_.jpg)