4 pins on mobo - 3 on fan?

schwachs said:

Hi... My tuniq tower stock fan has only a 3-pin connector but my P5B Deluxe has a 4 pin receptor. Can I just plug in the first three (as the only way it'll actually fit) and ignore the 4th pin which is the CPU FAN PWM? I assume PWN is for PoWer Mgmt?

Thanks!

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jivetrky said:

Actually PWM = Pulse Width Modulation

But I actually don't know what the 4 pin connector is for. You would just use the first three pins, which should be the only way it fits.

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jivetrky said:

Actually PWM = Pulse Width Modulation

But I actually don't know what the 4 pin connector is for. You would just use the first three pins, which should be the only way it fits.

Click to expand...

bing said:

3 pins fan assignment : Positive, Negative , RPM (mostly especially for PC coooling, some industrial use it for motor locked sensor/alarm)

4 pins fan assignment : Positive, Negative, RPM, PWM signal for controlling the fan speed/power

Fyi, if you watch closely the 4 pins fan header, it is by design to downward compatible for 3 pins fan.

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