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  1. #1
    New ROGer Array
    Join Date
    Apr 2021

    RAM not detected as dual channel on ASUS ROG CROSSHAIR VIII DARK HERO

    Building a ASUS ROG CROSSHAIR VIII DARK HERO + AMD Ryzen 9 5900X + HyperX FURY HX432C16FB3K4/128 ( 4 x 32 Go ) DDR4 3200MHz

    I am having problems with the RAM not being detected properly. CPUZ and bios tell me I have only 64GBytes on single channel.

    CPUZ memory tab displays :

    Type : DDR4
    Channel # Single
    Size : 64 Gbytes
    Uncore Frequency 1600 Mhz

    Timings :
    DRAM frequency 1601.3 Mhz
    FSBRAM 1:16
    CL : 22.0 clocks
    tRCD 22
    tRP 22
    tRAS 52
    tRC 74
    CR : IT

    What can I do to have the board operate in dual channel and detect the full 128GB at proper frequency.
    I figured this might have to do witht the ryzen and timings ... but me not being a hardcore tweaker I'm a bit lost ...

    Thanks for helping

  2. #2
    Moderator Array
    Join Date
    Feb 2019

    Hi there,
    How about under BIOS? how many GB or how many RAM is detected? please share the screenshot with us
    and in task manager?
    Thank you.

  3. #3
    ROG Guru: Grand Master Array Arne Saknussemm PC Specs
    Arne Saknussemm PC Specs
    Laptop (Model)Laptop?...No way! (Model?...Jun Amaki...yes way!)
    ProcessorTHREADRIPPER 3960X
    Memory (part number)TXBD48G4000HC18FBK
    Graphics Card #1GTX Titan X
    Graphics Card #2SLI is dead to me
    Graphics Card #3Tri SLI is even dead to Nvidia
    Graphics Card #4Quad SLI is dead to everybody especially my credit card
    Sound CardXonar Essence STX
    MonitorASUS ROG Swift PG279Q
    Storage #1Samsung 970/960/950 PRO
    Storage #22x OCZ VERTEX 3/2x WD Caviar Black 500GB / 2x WD RED 2TB/Samsung 1TBSSDs
    CPU CoolerCustom Loop: Dual D5s, Dual Alphacool Monsta 480s, XSPC Raystorm Neo TR4, EK TitanX WaterBlock
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    Power SupplySeasonic 1000 Platinum
    Keyboard Corsair Strafe MK2 ROG Claymore... or Fender Rhodes Electric Piano (MKI 73)
    Mouse Corsair M65Pro or Speedy Gonzalez...not Mickey...don't do Disney!
    Headset ...firmly on neck
    Mouse Pad Mouse don't got his own pad man...lives with me
    Headset/Speakers Edifier Spinnaker...or you mean the speakers in my too many voices to name them all
    OS Win XP, 7, 8, 8.1 and Windows 10 Spyware Edition
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    Accessory #3 3 accessories?! I'm not a girl!!
    Arne Saknussemm's Avatar
    Join Date
    Apr 2012

    For that density of memory...

    Try 1.4v or even 1.45 v DRAM voltage and set SOC voltage to 1.125 to 1.2v range

  4. #4
    ROG Member Array
    Join Date
    Mar 2021


    Are you using 64GB x 2 in your system?
    According to the manual, the mobo supports only 32GB DRAM stick. In order to get 128GB, you need to install 32GB x 4 on the mobo.

    If you are using 32GB x 4, then double check whether you have inserted the DRAM sticks into the socket securely.

    At this point, there is no need for you to tweak the voltage until your mobo recognize the correct DRAM capacity.

    Please check the manual of your mobo.

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