msi MPG Z490 Gaming Edge WiFi and a multi-fan CPU cooler

sdw.invan157d02e0

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Jan 1, 2021
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I'm building a PC with an MPG Z490 Gaming Edge Wifi mobo running an Intel i9-10850K, and cooling the CPU with a Noctua NH-D15. The cooler comes with two fans but can be run with only one fan. I'd like to run both fans. The mobo has only one CPU cooler fan connector labeled "CPU_FAN1", which, according to the User Guide, defaults to "auto mode", which I'm guessing means it figures out whether it should run the fan as PWM or voltage-controlled. (This is not well spelled out in the user Guide, one of several areas where the manual could be more clear.) There is also a mobo connector labeled "PUMP_FAN1", which defaults to PWM mode. Is it reasonable to plug the 2nd fan that comes with the HN-D15 into the "PUMP_FAN1" mobo connector, and if so, will it be well controlled by the mobo/BIOS in coordination with the fan connected to "CPU_FAN1?

If I've got this wrong, what is the "right" way to set up running both fans?

Thanks.

Humble PC builder.
 
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Dec 24, 2020
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I have the same cooler and mobo. After some search in the Noctua website i found a doc that says to use both fans using the Y splitter in the one CPU-FAN connector. I did it this way and so far is ok...
 

sdw.invan157d02e0

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Yeah, I found the same solution, connect both Noctua fans through the supplied "Y" connector to CPU_FAN1, implied in the Noctua documentation, but not made completely clear there. When I did this, on every start, I got a msg from the BIOS telling me there was a CPU Fan Error, even though the CPU fan blades on the Noctua cooler were turning. I went into the BIOS and changed the CPU fan control from "Auto" to "PWM", and that resolved the CPU Fan Error. My CPU temps are quite satisfactory now.
I did not upgrade the BIOS as the one that came with my mobo was dated Oct, 2020, just a day or two different from the one on the MSI web site. If it works, and it seems to be working, there's no real reason to change. Although I have seen a couple of blue screens when running hard, and maybe a BIOS update will fix that problem. We'll see.
Thanks for your reply.
 
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