Asus Z97m-plus case fan header capacity enough for two Noctua fans?

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MrSadman

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Jan 3, 2015
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As the motherboard supports PWM fans, I'm going to replace the fans that came with the case(Corsair 350D)

Right now considering 2x 140mm Noctuas in the front as intake and a 120mm in the back for outtake(this combination should keep positive pressure in the case with the GPU fan also exhausting air from the case)

The motherboard manual only states the current capacity for the CPU Fan header. Will I be fine using a PWM splitter for the two front Noctua fans powered from a single Case Fan header?
 
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ShadyHamster

ShadyHamster

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Jan 3, 2012
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I'm currently doing this on my Z87m-plus board so it should work perfectly fine on the z97 version.
Do the case fan headers on that board actually support PWM?
The 2 case fan headers on the Z87m-plus board are advertised as 4pin headers but don't actually send out a PWM signal, they are voltage control only.
 
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MrSadman

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From the motherboard user manual

1 x 4 pin CPU Fan connectors for both 3-pin(DC mode) and 4-pin(PWM mode) CPU coolers control

2 x 4 pin Chassis Fan connectors for both 3-pin(DC mode) and 4-pin(PWM mode) Chassis coolers control

The CPU_FAN connector supports the CPU fan of maximum 1A(12W)fan power.

The CPU fan connector detects the type of CPU fan installed and automatically switches the control modes.

The chassis fan connectors support DC and PWM modes. To set these fans... yadayada, bios, yadayada...

The pinouts of the headers are also labeled as a PWM header would be.
Should be PWM then.

Also,
The 2x 140mm Noctua fans should consume under 300mA, maybe up to 500mA on startup.
 
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