Connecting 2 CPU Fans and 5 case fans without controller?

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zibbz95

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Jun 6, 2017
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While planning on swapping the case for my build and adding more fans I´ve realized two things:
1) The mobo does not support the planned amount of 7 fans (1 back, 2 front, 2 top, 2 cpu).
2) I´m not even sure how to plug the 4 fans I currently have (1 back, 2 front, 1 cpu). The back one is currently plugged into AIO...

Will a fan control solve my problem with connecting everything and is there a link with a good guide on how to connect the fans correctly?
All my fans are Noctua NF-A14 PWM and for cpu NF-F12 PWM, my mobo Asus Prime z270-a.
 
Solution
P
Actually, you don't have any major problems. The CPU_FAN, CHA_FAN1 and CHA_FAN2 headers each can supply up to 1.0 amps to fans. The five Noctua NF-A14 PWM fans each can draw up to 0.13 A, so even connecting five of them to one fan header via a Splitter totals only 0.65 A. Likewise, the two NF-F12 PWM fans pull up to 0.05 A each, total 0.1 A. So you could easily use a simple Splitter to connect two NF-F12's to the CPU_FAN header; a different Splitter can connect five NF-A14 PWM's to one of the CHA_FAN headers. Here are examples

https://www.newegg.com/Product/Product.aspx?Item=N82E16812423161&cm_re=coboc_fan_splitter-_-12-423-161-_-Product...
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krzyimprt

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Mar 25, 2013
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So many fans is overkill. Not having an exhaust fan will easily raise temps 10-20c+. But after that the difference is negligible.
 
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Paperdoc

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Actually, you don't have any major problems. The CPU_FAN, CHA_FAN1 and CHA_FAN2 headers each can supply up to 1.0 amps to fans. The five Noctua NF-A14 PWM fans each can draw up to 0.13 A, so even connecting five of them to one fan header via a Splitter totals only 0.65 A. Likewise, the two NF-F12 PWM fans pull up to 0.05 A each, total 0.1 A. So you could easily use a simple Splitter to connect two NF-F12's to the CPU_FAN header; a different Splitter can connect five NF-A14 PWM's to one of the CHA_FAN headers. Here are examples

https://www.newegg.com/Product/Product.aspx?Item=N82E16812423161&cm_re=coboc_fan_splitter-_-12-423-161-_-Product

https://www.newegg.com/Product/Product.aspx?Item=N82E16882422017&cm_re=coboc_fan_splitter-_-82-422-017-_-Product

Another alternative for the five case fans is a Hub, which actually draws power for its fans directly from the PSU via a Molex output, but still uses the control signals of the mobo CHA_FAN header to control all the fans' speeds:

https://www.newegg.com/Product/Product.aspx?Item=N82E16812423166&cm_re=coboc_fan_splitter-_-12-423-166-_-Product

In BIOS Setup for the fan header you connect your CASE fans to, ensure that it is set to use the Motherboard temperature sensor, and not the one inside the CPU chip.
 
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zibbz95

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Jun 6, 2017
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510


Big thank you for your help! I found out that all of the Noctua fans comes with a Y-splitter aswell so now that I know the headers can handle the A´s I´ll try them out.
 
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