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Fan connections on Mobo

Last response: in Motherboards
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October 7, 2011 1:34:56 AM

I have a Gigabyte GA-Z68X-UD3H-B3 and I have spots for 4 fan connections.

CPU fan 4 pin
Sytem fan 3 pin
System fan 4 pin
Power fan 3 pin

My question is what is the signifigance of using these connections and what if the counterpart (power supply) has a 4 pin connection.

More about : fan connections mobo

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a c 223 V Motherboard
a c 1202 ) Power supply
October 7, 2011 1:59:27 AM

A 4-pin fan header offers fan speed monitoring and PWM (Pulse Width Modulation) speed control as long as you're using a PWM controllable fan.

A 3-pin fan header offers fan speed monitoring only. The fan runs at full speed unless it has its own speed control potentiometer or step down resistors.

Fans plugged directly into a power supply connector has no fan speed monitoring and runs at full speed unless it has its own speed control potentiometer or step down resistors.
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October 7, 2011 2:06:36 AM

Thanks for the reply. So I can plug the 4 pin connector into the 3 pin connection and I will just lose out on the PWM?
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a c 223 V Motherboard
a c 1202 ) Power supply
October 7, 2011 3:21:26 AM

Control_tech said:
Thanks for the reply. So I can plug the 4 pin connector into the 3 pin connection and I will just lose out on the PWM?

Yes. The fan will just operate at its maximum speed.
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October 14, 2011 7:05:13 PM

Best answer selected by Control_tech.
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