Fan 3 pin Pinout

[Mantrid-Drone]

Foolishly whilst taking off a three pin fan header plug so I could sleeve the cable I didn't make a note of the order and they're not coloured. It is a question of which way round they should be. When I searched I found at least one contradictory picture, used on several web sites for the 3 pinouts which threw me.

My own testing using a battery shows that one is +, one is - (GND) and the other is ? but apparently for RPM reporting.

The sequence most commonly shown, from the back of the header plug and corresponding to MB header pins 1 - 3 from left to right, is:-

Pin 1 = GND (usually black where coloured wires are used)

Pin 2 = 5v/12v (usualy red where coloured wires are used)

Pin 3 = RPM (usually yellow where coloured wires are used)

This is the particular page that made me decide to check here.

http://www.allpinouts.org/index.php/Motherboard_(CPU)_3_Pin_Fan_Connector

The diagrams show the order as above but the photo shows what must be the RPM wire in (2) and the red 5v/12v wire in (3).

I'm fairly certain the photo is misleading but the diagrams are correct. However I thought I'd just just better check here that the correct order from left to right is indeed GND, 5v/12v and RPM.

 

[dma0991]

Yup, its order resemble Germany's flag. I'm certain that the first picture in that link is wrong as it then provided a drawn version below it with the correct order.

 

[Mantrid-Drone]

Thanks for confirming it.