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  1. #1
    ROG Member Array pam007 PC Specs
    pam007 PC Specs
    Motherboardsystem #1 ASUS Rampage V E10 X99 , system #2 Maximus X Hero Z370
    Processor#1 i7-6950X , #2 i7-8700K
    Memory (part number)#1 G. Skill Ripjaw DDR4-3200 16GB , #2 G. Skill Ripjaws DDR4-2666 16GB
    Graphics Card #1#1 and #2 EVGA GTX 1080 ti FTW3
    Monitor#1 Acer 34" X34P Preditor , #2 50" 7100 Samsung TV
    Storage #1#1 and #2 Samsung 970 EVO 1TB
    CPU Cooler#1 and #2 EK Supremacy EVO waterblock
    Case#1 Thermaltake Core X9 , #2 Corsair Air 540 Cube Case
    Power Supply#1 EVGA G2 850 , #2 Corsair HXi-850 850 watts
    OS #1 and #2 Windows 10 64-bit

    Join Date
    May 2016
    Reputation
    10
    Posts
    17

    Setting Chassis Fan Control below 60%

    I like my Maximus VIII Hero Z170 so much I had to replace my MSI X99 motherboard with a Strix X99 motherboard in my second system.

    But there's one thing I don't understand. How come ASUS motherboards don't allow manual DC Chassis Q-Fan Control to be set below 60%?

    I notice this was also true with the Hero Z170, but I was able to work around this in the advanced monitor settings (and as long as I didn't ever go back and change anything in Q-Fan Control). Strix X99 won't even allow the work around.

    Is this a purposeful safe guard/limitation ASUS designs into the UEFI?

    My second system specs:
    ASUS Strix X99 Gaming BIOS: 0401
    Intel i7-5930K CPU
    EK Supremacy EVO waterblock CPU cooler
    GSkill 4x4GB DDR4-PC3200 memory
    EVGA GTX 980 ti Classified graphics card
    EVGA G2 850 watts PSU
    Thermaltake Core-X9 case

  2. #2
    ROG Guru: Yellow Belt Array Onimax PC Specs
    Onimax PC Specs
    MotherboardRampage V Edition 10
    ProcessorIntel Core i7 6950X
    Memory (part number)G.Skill RipJaws V DIMM Kit 128GB, DDR4-3000, CL14-14-14-34 (F4-3000C14Q2-128GVKD)
    Graphics Card #1NVIDIA TITAN X (Pascal)
    Graphics Card #2NVIDIA TITAN X (Pascal)
    Monitor2* ASUS ROG Swift PG279Q
    Storage #1Samsung 950 Pro 512GiB
    Storage #2Samsung 850 Pro 1TiB
    CPU CoolerEKWB Custom loop
    CaseCaseLabs Magnum SMA8
    Power SupplyCorsair AX1500i
    Keyboard Logitech G910
    Mouse Logitech G900
    Headset SteelSeries H Wireless
    OS Windows 10 x64

    Join Date
    Dec 2014
    Reputation
    11
    Posts
    149

    Hi pam007, did you already perform the fan tuning? (It's located in the AI Suite under Fan Expert -> "Fan Tuning" - and can also be accessed in the EFI under "Monitor" in advanced view)
    That way the mainboard checks at what PWM strength/DC voltage your fans start to spin.

    Generelly speaking DC controlling your fan is not so fine grained as controlling your fan via PWM, so if you have that option I'd recommend to give it a shot.
    If you really want very low rpms with fans that are able to operate at 2-3k rpm try to find some extended range fans like the Noctua PPC Industrial 2000 or the new Corsair ML120/140 Pro - those are actually able to spin at ~300rpm.

    Hope that helps.

  3. #3
    ROG Member Array pam007 PC Specs
    pam007 PC Specs
    Motherboardsystem #1 ASUS Rampage V E10 X99 , system #2 Maximus X Hero Z370
    Processor#1 i7-6950X , #2 i7-8700K
    Memory (part number)#1 G. Skill Ripjaw DDR4-3200 16GB , #2 G. Skill Ripjaws DDR4-2666 16GB
    Graphics Card #1#1 and #2 EVGA GTX 1080 ti FTW3
    Monitor#1 Acer 34" X34P Preditor , #2 50" 7100 Samsung TV
    Storage #1#1 and #2 Samsung 970 EVO 1TB
    CPU Cooler#1 and #2 EK Supremacy EVO waterblock
    Case#1 Thermaltake Core X9 , #2 Corsair Air 540 Cube Case
    Power Supply#1 EVGA G2 850 , #2 Corsair HXi-850 850 watts
    OS #1 and #2 Windows 10 64-bit

    Join Date
    May 2016
    Reputation
    10
    Posts
    17

    That makes sense now. I forgot about some fans not having the ability to start spinning at lower voltages.

    I use three 120mm x 38mm Delta high static pressure/high RPM fans that are very efficient at pushing air through an EK-CoolStream XE 360 radiator. They can do this even at low RPM. They're DC (3-pin) fans that can start spinning at extremely low voltages, at ~10%.

    I'm sorry, I haven't installed the OS so I can't use AI Suite yet. The first thing I do is perform fan tweaks in the UEFI because three 3000 RPM fans blowing air full tilt through a high fin, 60mm thick radiator scares the wits out of my cat, lol.

    I tried changing "min duty cycle (%)" under "Monitor" in the advanced EFI to a value below 60, but every time I do so, it immediately switches back to 60. As mentioned, the Hero Z170 allowed me to do this, but the X99 Strix does not.

    It looks like I'll just have to wait until after I install Windows then.

    Thanks for your help.

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