Asrock Z97 Extreme6's Single PWM Fan Controller: Optimal usage?

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caluk

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Nov 28, 2012
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I have two 4 pin PWM fans and an ASRock z97 Extreme 6 with one 4 pin fan header but three 3 pin headers.

What's the optimal way to use that single pwm header? Like, am I better off using it for the rear exhaust fan or maybe use it for an intake?
 
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clutchc


I usually use a PWM header for a lighted front intake fan. I don't need it to run at full RPM most of the time, but enjoy the full brightness of the LEDs. 3 pin fans vary speed by varying the CD voltage. This causes the LED brightness to vary as well. PWM fans keep the voltage constant but vary the DC pulses to control fan motor speed.

It is also possible to run 2 identical PWM fans from a single header using one of these...
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clutchc

clutchc

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I usually use a PWM header for a lighted front intake fan. I don't need it to run at full RPM most of the time, but enjoy the full brightness of the LEDs. 3 pin fans vary speed by varying the CD voltage. This causes the LED brightness to vary as well. PWM fans keep the voltage constant but vary the DC pulses to control fan motor speed.

It is also possible to run 2 identical PWM fans from a single header using one of these: http://www.newegg.com/Product/Product.aspx?Item=N82E16812162026
Note the missing pin in one of the male connectors. That is done so only one fan provides tach feedback to the BIOS for a more accurate RPM display.
 
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