Cooling how people installing so many pwm fans?

[Khabib]

How are people installing so many PWM fans on ITX motherboard? Most of them only have like 2 pins...are we all just using some janky 4 pin splitters?

 

[nkresho]

There are splitters out there that grab power from sata or molex (from your PSU) and only need one motherboard output for the PWM signal. Every motherboard has at least one 4 pin cpu fan header.

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linustechtips.com

No real degradation in PWM granularity with under 10 fans connected.

 

[Jello]

How are people installing so many PWM fans on ITX motherboard? Most of them only have like 2 pins...are we all just using some janky 4 pin splitters?

There's not really anything janky about them.

On my ASRock board, the 4 pin fan headers are rated for 1A. A single Noctua F12 PWM fan has a max input current of 0.05A. In theory you could run 20 fans off one header, but I don't really know of an ITX case that uses that many.

 

[prayogahs]

If you buy the standard noctua fans, they come with official Y-splitter so nothing janky about them or any other Y-splitters as well. Most headers supply 1A or even 2A currents so plenty enough to power several fans with multiple Y-splitters.

 

[Khabib]

thanks all for the reassurance. ill be ordering a 4 pin splitter. i read some reviews and thought they were all janky.

 

[flar]

Just for another data point, the Celsius S24 AIO comes with a fan splitter header built-in and it is powered from the same single 4-pin fan header connection that also powers the pump. So, there is a common AIO solution that has no qualms with powering 2 fans plus a pump off a single fan header...