Asrock X370 itx/EK DDC pump problems

[TealHoneyBadger]

Hi guys,

 

I just bought some new fans for my build (Noctua slim fans and Corsair ML120s) and in doing so freed up the "Pump" Header on my motherboard. I set the header to work as "W_Pump" and put it in PWM mode, as that is what I have, a DDC PWM pump, and the pump just wouldn't run, so I reattached it to the molex cable I had been using, and it now works again, albeit very loudly as before. Does anyone know how the W_Pump header on the Asrock X370 ITX/ac is supposed to work? I can't figure this out.

 

Thanks for any help you can offer.

[For Science!]

2 minutes ago, TealHoneyBadger said:

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The PWM header is mearly to control the speed of the DDC pump, it still requires power from the molex adapter. Once plugged into a PWM header, the pump speed can be controlled via the BIOS. The fan header does not provide the pump with any power, that is why it only has 2 cables coming off it. PWM sense and RPM report.

[TealHoneyBadger]

Yep, I realised that as soon as I posted, I swear I must have been dropped on my head at birth.

 

Thanks for the help though, hopefully one day another hapless watercooling enthusiast will be saved a headache.