Pinouts >  Распиновки разных разъемов на материнской плате
4 pin motherboard fan  connector layout
Разъем 4 pin motherboard fan
For 4-Wire Pulse Width Modulation (PWM) Controlled Fans
Description Wire color
1 GND Ground black
2 +12V Fan Power yellow
3 SIGNAL Fan RPM green
4 PWM Digital Control blue

The PWM signal from the motherboard sources 5V during the on state of the pulse, otherwise it's pulled to ground.

The tacho signal from the fan sinks to ground for every revolution, the input on the motherboard is pulled high.

3-pin fan and 4 pin motherboard connector compatibility: 

A fan with a 3-pin power connector may be easilly fitted into desktop board with a 4-pin fan header



4 pin fan cable connector layout
Разъем 4 pin fan cable
На распиновку Motherboard 4 pin CPU PWM fan connector есть 30 отзыв(а): 28 положительных и 1 отрицательных.

Эта распиновка
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