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  1. #1
    New ROGer Array
    Join Date
    Jan 2021
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    Settings don't apply until observed

    I have an ROG Strix X570-E Gaming motherboard, with a DC case fan plugged into the M.2_FAN header on the motherboard. It is running the latest (v3001 right now) BIOS.

    Since this is a noisy stock 120mm fan, and I have plenty of other cooling, I would like it to be off until it's really needed. I have configured it as follows:

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    With the fan curve:

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    So I would expect the fan to be off most of the time. One thing I notice is that there isn't an explicit "Enable fan off" checkbox for this fan, which there is for the other DC case fan plugged into CHA1_FAN.

    When I power on the machine (or suspend+resume), the fan is set to full speed:

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    It stays at this speed, until I click on the fan curve tab in the BIOS, then it powers down, as expected:

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    So I can get the effect I want if I boot into the BIOS every time I turn on my machine... Not ideal!

    I believe this is a bug - is there something I'm missing?

    Thanks

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