Motherboard fan header power

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   Three of your fans might be a bit much for the Chassis fan header. 

Some fans will draw more than their rated power if run at full speed, when first starting up. That spec is called the "Safety Current", which is usually not given by most manufactures, including Corsair. The usual Safety Current specs I've seen is twice the maximum current.

There is no spec for the Chassis fan header on your board. That means it is at best 1.0A, and most likely less, 0.5A being common now.

I would not want to run three fans whose total power usage is over 0.5A on a fan header with an unknown current spec. If the fans were rated at 0.15A or less, then using three on one header would be fine.

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parsec Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 04 May 2015 Location: USA Status: Offline Points: 4996	Post Options Post Reply Quote parsec Report Post Thanks(1) Quote Reply Topic: Motherboard fan header power Posted: 07 Jun 2016 at 12:44pm
	Three of your fans might be a bit much for the Chassis fan header. Some fans will draw more than their rated power if run at full speed, when first starting up. That spec is called the "Safety Current", which is usually not given by most manufactures, including Corsair. The usual Safety Current specs I've seen is twice the maximum current. There is no spec for the Chassis fan header on your board. That means it is at best 1.0A, and most likely less, 0.5A being common now. I would not want to run three fans whose total power usage is over 0.5A on a fan header with an unknown current spec. If the fans were rated at 0.15A or less, then using three on one header would be fine.


Welho Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 07 Jun 2016 Status: Offline Points: 3	Post Options Post Reply Quote Welho Report Post Thanks(0) Quote Reply Posted: 07 Jun 2016 at 3:53am
	Hi. I'm wondering if i can power 3 fans from 1 fan header on the motherboard, if i use a 3-way fan splitter. I have a 970m Pro3 Mobo and 3 AF140 LED fans that each need 0,23 amps. Does the power fan header on the mobo give enough amps for 3 fans, or should i only plug in 2 fans?