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  1. #1
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    Cool Fix to coilwhine on Maximus Hero XIII

    EDITED - No current fix. Maximus Hero XIII has really loud idle coilwhine when default C states are enabled. Very annoying.
    Last edited by Dave2150; 04-23-2021 at 08:37 PM.

  2. #2
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    Hmm, very interesting, i'll give it a try.

    However i've already fixed my coil whine by disabling the C-States of the CPU.
    You see, i noticed that my problem was actually the *low* VCore voltage that was applied to the CPU, while idling, especially when idling + moving the mouse.
    Maybe your coil whine had a different cause than mine, who knows.

    It's good to see that it resolved your problem though, i will re-enable C-States and try it.
    Thanks for the update on that topic !

  3. #3
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    Quote Originally Posted by Dave2150 View Post
    Hey guys. This is a bit late for those that returned the motherboard already, but I found a solution to the coilwhine issue (that worked for me at least).

    I've been using the board for just under 24 hours with my 11900k, and suddenly out of nowhere, I was greeted with bird chirping coilwhine noise, at idle. Rebooted to BIOS, no coilwhine there, so thought it might be software. From past experience with similar issues with GPU's, I went hunting for any software that's been auto installed by windows updates and found this little chestnut:



    Stop this service, disable it, and the noise completely goes away The process that this service starts was also using 4-5% CPU...

    P.S. I believe this was installed via Asus Armory, which found it's way onto a fresh Windows10 20H2 install via automatic updates.

    Hope this helps someone, Cheers
    That's AURA lighting service. If you have crate installed RGB effects wont work without it. If you dont care then Id suggest going into windows update advanced options and disable automatic driver updates. Ive never had this download from windows update but its guaranteed if you install Aura or Armory Crate.

    Coil Whine is dependent on GPU load. You have something funky going on if you get it at idle. Do you run any HDDs?
    Last edited by BigJohnny; 04-02-2021 at 01:47 AM.

  4. #4
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    I had this coil whine as well, but the AURA or Armoury Crate or whatever was not installed. So that was not the case with my system at all.
    Disabling C-States worked, but I did not want to leave that disabled.
    For me, I was using a 10900K, and the whine was only present when playing some video or audio file via some player, otherwise, the YT or whatever, did not produce the same result.

  5. #5
    ROG Enthusiast Array EncodeGR PC Specs
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    I'm afraid Lighting Service is not the cause of the problem for me either. I don't even have that service running.
    It has to do with low VCore in relation to VID.
    Last edited by EncodeGR; 04-04-2021 at 10:37 AM.

  6. #6
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    This is clearly a VRM problem related to VCore changes.
    I've tested it multiple times. Vcore fluctuations = Coil Whine.

    Instead of disabling *all* C-States (which works), i tried a different approach.
    I switched from Auto / Adaptive Voltage for VCore to Manual.

    As expected, applying a fixed cpu voltage completely removes the coil whine issue.
    I will also try to change the "VRM Switching Frequency" in Bios, as many people have suggested that it may solve the problem too.
    Last edited by EncodeGR; 04-05-2021 at 08:29 AM.

  7. #7
    Administrator Array Silent Scone@ROG's Avatar
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    Quote Originally Posted by Dave2150 View Post
    Hey guys. This is a bit late for those that returned the motherboard already, but I found a solution to the coilwhine issue (that worked for me at least).

    I've been using the board for just under 24 hours with my 11900k, and suddenly out of nowhere, I was greeted with bird chirping coilwhine noise, at idle. Rebooted to BIOS, no coilwhine there, so thought it might be software. From past experience with similar issues with GPU's, I went hunting for any software that's been auto installed by windows updates and found this little chestnut:



    Stop this service, disable it, and the noise completely goes away The process that this service starts was also using 4-5% CPU...

    P.S. I believe this was installed via Asus Armory, which found it's way onto a fresh Windows10 20H2 install via automatic updates.

    Hope this helps someone, Cheers


    This has nothing to do with the Lighting Service and is caused by the change in CPU usage and current demand. Power saving modes can exacerbate it, but you will often always get some noise when there are rapid changes in current.
    Last edited by Silent Scone@ROG; 04-06-2021 at 06:05 AM.

  8. #8
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    I was just wondering, since the board has two 8 pin CPU power connectors, are you using one or both of those?

    A month or so ago I complained about the Lighting service keeping the processor running at high speeds. That was eventually fixed, I believe, but I haven't checked lately.

    Coil whine can be caused by multiple events. I have seen descriptions of it being so bad on a Dell system that the student could not stay in class when it was happening..

    My board will be here maybe Thursday so I will check when I get it set up.

  9. #9
    ROG Enthusiast Array EncodeGR PC Specs
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    Quote Originally Posted by Silent Scone@ROG View Post
    This has nothing to do with the Lighting Service and is caused by the change in CPU usage and current demand. Power saving modes can exacerbate it, but you will often always get some noise when there are rapid changes in current.
    Thank you for clarifying it Silent Scone. It makes sense.
    So, let me see if i got this right. If for example i set an OC "By Core Usage" with Auto Voltage + V/F (and C-States Enabled) as follows:

    1-core : 53x
    2-core : 53x
    3-core : 52x
    4-core : 52x
    5-core : 51x
    6-core : 51x
    7-core : 50x
    8-core : 50x

    (ex V/F: 0.60v - 1.45v

    i should expect some high coil whine, if the application core-usage jumps all over the place, simply because the frequences (and voltages due to V/F Curve) jump all over the place.

    However, if an "Sync All Cores" Manual/Fixed OC is applied, Vcore will be fixed, and thus no coil whine should be observed. Am i correct ?
    Same thing applies when all C-States are disabled, since VCore stays max.

    I wouldn't mind disabling C-States, however the problem is that when i disabled C-States, my "By Core Usage" OC was messed up, locking the boost to the lowest core-ratio. Should have i disabled "specific" C-State(s) or changed "Package C-State Limit" ?
    Last edited by Silent Scone@ROG; 04-06-2021 at 06:06 AM.

  10. #10
    ROG Enthusiast Array EncodeGR PC Specs
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    Possible Bug Found !

    ** UPDATE **

    I think i can confirm there is a bug in Z590 Hero Bios, with power saving when OCing using "By Core Usage".
    After extensive testing i found that:

    • "Sync All Core" 50x + Auto Voltage = NO Coil Whine (C-States = Auto).


    • "By Core Usage" 50x-50x-50x-50x-50x-50x-50x-50x + Auto Voltage = CONSTANT Coil Whine. (C-States = Auto)



    The above two OC configurations should result into the same thing, same clocks, same voltage applied. Only "By Core Usage" though results in constant coil whine.

    Few Things About "By Core Usage":
    It's weird that while all "high performance" / "balanced" / "power save" modes in Windows behave as they should in term of clock speeds (meaning while idle, either: Full Speed / Base Clock / Minimum Clock ), in terms of voltage there is some strange behaviour, resulting in voltage drops to 0.666v in EVERY profile.

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