![3 pin fans: What are the voltages used by the tacho (speed) line? | AnandTech Forums: Technology, Hardware, Software, and Deals 3 pin fans: What are the voltages used by the tacho (speed) line? | AnandTech Forums: Technology, Hardware, Software, and Deals](https://forums.anandtech.com/proxy.php?image=https%3A%2F%2Fforum.level1techs.com%2Fuploads%2Fdefault%2Foriginal%2F3X%2Fc%2Ff%2Fcf50e545602e40caaeebaa34d0a9ada6a8b9e720.jpg&hash=96ce46325f24352ef3987fa634aea49a)
3 pin fans: What are the voltages used by the tacho (speed) line? | AnandTech Forums: Technology, Hardware, Software, and Deals
![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
![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
![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
![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)