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  1. #1
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    Z490 ROG Strix-E: No vrm fan control

    Ok so specifically the issue is this, The included VRM fan doesn’t work when connected to the vrm_hs_fan header on the motherboard.
    What I have done so far, and I’m doing this from memory while at work so i don’t recall the exact paths or names of some of these things so I apologize in advance. *
    *Updated to latest Bios
    Verified fan functionality on different header
    Verified *AI cooling features are disabled*
    *Attempted to Set manual fan settings in bios, ie 100% but it doesn’t populate as option to change in QFan.
    *The Bios does recognize the header on a page where you can set it to either “Ignore or Monitor”, but only states “N/A” when monitoring.
    I installed AI Suite 3 I belive it’s called from armory crate and this program see’s the *vrm_hs_fan header but I still cannot get it to turn on.

    *At this point i feel like it’s a bugged policy or setting that’s set to only turn on at a set degree or temperature and that’s why I cannot get it to change, at least that’s my theory. That or I’m simply missing a Bios page and it’s an easy fix.Any help would be greatly appreciated, Im hoping it’s just that I’m new to ASUS boards as I’ve ran gigabyte for last build but decided to buy 2 of these for mine and my wife’s z490 builds however her processor isn’t arriving till next Monday so I can’t confirm same issue on hers. However, someone else also has this issue on Toms Hardware forums but hasn’t gotten it solved yet *so I’m hoping to link this thread when we figure it out.*

    *Cheers **

  2. #2
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    I thought this was a DC header and you can't control speed on it? Mine plugged in and it just runs at 100%, it is just a 3 pin fan so you shouldn't have full PWM control over it.

    Try the stock bios settings again and just turn on your XMP memory speeds. See if it gives the fan 100%

    Worst case scenario can you just run it in a diff fan header and have it scale to CPU temp?

  3. #3
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    Quote Originally Posted by m4ttjirm View Post
    I thought this was a DC header and you can't control speed on it? Mine plugged in and it just runs at 100%, it is just a 3 pin fan so you shouldn't have full PWM control over it.

    Try the stock bios settings again and just turn on your XMP memory speeds. See if it gives the fan 100%

    Worst case scenario can you just run it in a diff fan header and have it scale to CPU temp?
    First i want to say thanks of taking time to reply, because all help is appreciated because my next words are straight and to the point.

    It is a 4 pin.
    I've flashed the bios 3 times.
    Running this fan to a different header would work, however that doesn't address my issue of a header not working on a brand new board. It's a brand new board and I'll send it back before it do that. :-)

    Newegg has my wife's i9-10900K charted for Tuesday arrival. I'll test out her's then and see if it works.

    What you're saying is you also own a z490 Strix-E gaming motherboard and have the included vrm fan plugged in to the vrm_hs_fan header and it works correct? I just noticed that the mods moved my post to the z370/z390 thread possibly for exposure when i had this posted to Hardware and Software Support.

    Thanks,
    -Mass

  4. #4
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    Quote Originally Posted by MassExit View Post
    First i want to say thanks of taking time to reply, because all help is appreciated because my next words are straight and to the point.

    It is a 4 pin.
    I've flashed the bios 3 times.
    Running this fan to a different header would work, however that doesn't address my issue of a header not working on a brand new board. It's a brand new board and I'll send it back before it do that. :-)

    Newegg has my wife's i9-10900K charted for Tuesday arrival. I'll test out her's then and see if it works.

    What you're saying is you also own a z490 Strix-E gaming motherboard and have the included vrm fan plugged in to the vrm_hs_fan header and it works correct? I just noticed that the mods moved my post to the z370/z390 thread possibly for exposure when i had this posted to Hardware and Software Support.

    Thanks,
    -Mass
    I am having the same issue and haven't been able to figure it out. I have the fan plugged into CHA-FAN1 right now and it's fine but I would like to use the VRM fan header. Were you able to figure it out?

  5. #5
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    Quote Originally Posted by SirBubby View Post
    I am having the same issue and haven't been able to figure it out. I have the fan plugged into CHA-FAN1 right now and it's fine but I would like to use the VRM fan header. Were you able to figure it out?
    I have not.

    I called ASUS tech support and was informed they would create an escalated ticket for me and respond with 72 hrs. They have not contacted me and it’s been a week as of today.*

  6. #6
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    Quote Originally Posted by MassExit View Post
    I have not.

    I called ASUS tech support and was informed they would create an escalated ticket for me and respond with 72 hrs. They have not contacted me and it’s been a week as of today.*
    Here is what they sent me today... not that helpful. I'm assuming it kicks on when the VRM's get too hot.

    "Thank you for contacting ASUS Product Support.
    My name is John L. from Level 2 support and it's my pleasure to help you with your problem.

    I am writing this email to provide you an update about your ongoing case. According to our engineers, We don't allow VRM fan to be control as default. The fan is smart and detects temperature and change rpm accordingly.

    If you have any other questions, please feel free to contact us again for assistance. Thank you for choosing ASUS Product and Services."

  7. #7
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    Quote Originally Posted by SirBubby View Post
    Here is what they sent me today... not that helpful. I'm assuming it kicks on when the VRM's get too hot.

    "Thank you for contacting ASUS Product Support.
    My name is John L. from Level 2 support and it's my pleasure to help you with your problem.

    I am writing this email to provide you an update about your ongoing case. According to our engineers, We don't allow VRM fan to be control as default. The fan is smart and detects temperature and change rpm accordingly.

    If you have any other questions, please feel free to contact us again for assistance. Thank you for choosing ASUS Product and Services."
    Suspicions confirmed then. Thanks.

  8. #8
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    Quote Originally Posted by MassExit View Post
    Suspicions confirmed then. Thanks.
    I think it's BS. I ran a 15 minute stress test on Intels Extreme Tuning Utility and the fan never came on. Keep in mind my chip is overclocked as well meaning there's even more heat compared to a stock cpu/board.

  9. #9
    ROG Enthusiast Array GObonzo PC Specs
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    MotherboardROG Strix Z370-E Gaming
    Processori7-8700K @5GHz
    Memory (part number)G.Skill F4-3200C14D-16GTZSW
    Graphics Card #1EVGA GTX 1080 Ti FTW3 GAMING
    MonitorMSI Optix MPG341CQRV (34" 3440x1440p)
    Storage #1SSDs: 5.25TB, M.2 NVMe: 512GB
    Storage #2external - HDs: 8TB
    CPU CoolerROG Ryujin 360
    CaseFractal Design Vector RS (5x be quiet! Silent Wings 3 140mm High-Speed PWM)
    Power Supplybe quiet! DARK POWER PRO 11 750W
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    try and get the support rep to give you some more info, like at what temp exactly the fan is supposed to kick in.
    even when stress testing, my VRM & PCH do not seem to get all that hot so if it's based on those temps reaching dangerous levels it seems kind of pointless.

    it really should be user controlled so you can use it how you like. my Ryujin cooler has it's own VRM fan and just running it at a constant ~50% actually keeps my VRM, PCH, and RAM at a couple degrees cooler than they used to be. it's a cool option to have, too bad you can't implement it.
    ASUS Strix ROG Z370-E Gaming | i7-8700K \ ASUS ROG Ryujin 360 | G. Skill Trident Z 3200 CL14 2x 8GB | EVGA FTW3 1080 Ti | be quiet! Dark Power Pro 11 750w | M.2 480GB \ SSD: 5.25TB \ HDD: 8TB | Fractal Design Vector RS \ 5x be quiet! Silent Wings 3 140mm High-Speed PWM | MSI Optix MPG341CQRV | Logitech G600 | Corsair K70 LUX RGB | Xbox One S Gamepad | Corsair Void Surround

  10. #10
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    Has anyone solved it? However, I noticed that at boot the fan turns, for not even a second

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