does a Chassis fan need to be connected to Mobo to function?

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Saro13

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Okay so I am wondering if current generation motherboards these days need at least 1 Chassis fan connected to a fan header in order for it to function and not prevent it from posting due to no fan connected? I am going to be building a PC and have all of my case fans connected to a fan controller. I still plan on plugging the CPU fan into the CPU fan header on the Motherboard. But all other fans (Exhaust + Intakes) will be connected only to my Fan Controller.

Reason I ask this is because a old PC I owned way back when would lock me out with a message along the lines of no fan connected. Unless I plugged a fan into any of the fan headers on the board. So I am wondering if boards these days will post normally if I have no fans (Besides the CPU fan) connected to any of the fan headers on the board?

To be specific on the board I am going with a Asus Z170-a
 
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Karadjgne
The bios requires only 1 fan header to be used, the cpu fan. It's a security measure to prevent cpu damage. Pc won't boot without something on that header. Every other fan header and any and all other fans are not a requirement, you can power your entire collection of fans directly from the psu if you want.

Corsair recommends connecting it's lower end aio pumps to the cpu fan header (to take advantage of the mentioned security measure should the pump fail) and the actual aio cpu fan connected anywhere else. Cpu fan header is a pwm header requiring a 4pin pwm connection for speed control, 3 pin fans/pumps will run at a constant 12v, no control. Any other header is variable, some will control either, some like cpu_aux have no control...
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maxalge

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not needed for other fans, cpu fans though you do need to plug into the marked headers

 
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Karadjgne

Karadjgne

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The bios requires only 1 fan header to be used, the cpu fan. It's a security measure to prevent cpu damage. Pc won't boot without something on that header. Every other fan header and any and all other fans are not a requirement, you can power your entire collection of fans directly from the psu if you want.

Corsair recommends connecting it's lower end aio pumps to the cpu fan header (to take advantage of the mentioned security measure should the pump fail) and the actual aio cpu fan connected anywhere else. Cpu fan header is a pwm header requiring a 4pin pwm connection for speed control, 3 pin fans/pumps will run at a constant 12v, no control. Any other header is variable, some will control either, some like cpu_aux have no control either pwm or analog, just a straight 12v supply and tach info. It is recommended, if you have no other means of speed control, to use motherboard connections, if for nothing else but volume considerations, a system in idle state really doesn't require the max fan output of a constant 12v, and neither do your ears.
 
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