Connect a 2-wire Fan to a 4-pin Header without an adapter.

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BuBu Shofronea

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Sep 10, 2014
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So is it possible ? To connect a 2 wire old fan with no available adapters to a 4-pin header on the MoBo ?
And if yes, there are 4 pins : 1, 2, 3, 4
The Fan is 12 V
In which pin ( 1/2/3/4 ) should i attach the red wire and in which one ( 1/2/3/4 ) the black one ?
 
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J
The problem is the colours aren't standardized for all. But in general pin 1 is negative and pin 2 is positive. Black goes to pin 1 and red goes to pin 2. Pin 1 should be black.
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JohnKau

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Feb 5, 2015
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Yes it's possible since the 3rd and 4th wires are for monitoring fan speed and controlling fan speed respectively. I suggest you get a 2 pin to 4 pin adapter or a 2 pin to 3 pin one and just plug the 3 pin one into the mobo for a simpler solution. For the wiring you can check this out: http://pcbheaven.com/wikipages/How_PC_Fans_Work/
 
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JohnKau

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Feb 5, 2015
97
1
4,660
The problem is the colours aren't standardized for all. But in general pin 1 is negative and pin 2 is positive. Black goes to pin 1 and red goes to pin 2. Pin 1 should be black.
 
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