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How many fans will run on a single 4 Pin header?

Wallabyhorse
By Wallabyhorse
in CPUs, Motherboards, and Memory
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Posted

I just bought five Arctic p12 pwm fans that can daisy chain together. How many are safe to run together at the same time off a single fan header? Is there a difference between a daisy chain and a splitter? I have a Asus x570 tuf gaming motherboard

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Depends on the type of port. Most 4 pin headers provide 1a at 12watt, most fans use I think .2a. So I wouldn't try more than 3 per header. If you have a board with a High Amp port, those sometimes do 3a at 36 watt. So you can put significantly more on those ports.

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Most pwm fan header can handle around 1a, the p12's specifically are .2a fans So you can techincally plug up to 5 per header. 

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5 fans per header, but to be safe, use 3.

Different fans may have different amp rating, it should be written on the back of the fan.

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