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  1. #1
    ROG Enthusiast Array xator PC Specs
    xator PC Specs
    MotherboardASUS ROG Maximus X Hero WIFI AC
    ProcessorIntel Core i7 9900k
    Memory (part number)2x16GB Corsair Vengeance LPX 3000Mhz
    Graphics Card #1EVGA GTX 1080Ti SC2
    MonitorDell U2518D
    Storage #1Samsung 970 evo NVMe SSD 250GB + HP S700 SSD 250GB
    Storage #22x WD RED SATA 3 2TB
    CPU CoolerNoctua NH-D15S
    CaseCorsair 600C
    Power SupplyCorsair RM850X
    Keyboard Logitech K360
    Mouse Logitech M705
    Headset Sony MDR-XB650BT
    Headset/Speakers Logitech Z4 2.1
    OS Windows 10 Pro x64
    Accessory #1 Xbox 360 Wireless Receiver
    Accessory #2 Xbox One Wireless Adapter

    Join Date
    Jun 2013

    Exclamation VCCIO and VCCSA voltage close to LN2 values on AUTO with LN2 mode disabled - HERO

    Hi there,

    I'm trying to undervolt my 8700k + Maximus X Hero, because this system goes crazy on voltage, and I've come across something weird:

    Having LN2 Mode disabled, and most of the settings AUTO, gives me VCCIO and VCCSA values of LN2 mode (or closer):

    LN2 mode is disabled:
    Click image for larger version. 

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    As you can see, i haven't XMP selected either.

    Here are the auto values:
    Click image for larger version. 

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    It's not a visual bug, HWinfo also reports this high values:
    Click image for larger version. 

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    Anyone having the same issue? Please ASUS, say something :-(

  2. #2
    ROG Guru: Yellow Belt Array Carlyle2020 PC Specs
    Carlyle2020 PC Specs
    MotherboardAsus Maximus XI APEX w/o vrm heatsink
    Memory (part number)Corsair LPX 4000 CL19@17.21.41/560/2T
    Graphics Card #1OOO RTX 2080 Ti FTW3 ULTRA
    Graphics Card #2GTX 1060
    Sound CardOOO Xonar STX modified
    Monitor21: 9 LG 34 inch / flat
    Storage #11TB 960evo
    Storage #22TB 970evo plus
    CPU CoolerNoctua NH-D15
    CaseSilverstone FT2 +200 bucks of sounddampening
    Power SupplySeasonic TX-850 RMAed the prime tita1000w
    Keyboard Cherry KC 1000 / OOO CORSAIR K63 + lapboard
    Mouse MX Master 2S
    Headset Sennheiser PC360 + Philips X2HR
    Headset/Speakers klipsch 4.1 pc speaker /cooling modified
    OS Win 10 64bit
    Network Routeryeah right...
    Accessory #1 Silverstone EBA01 headphone stand / black
    Accessory #2 radio Keyfob to turn on and off from Garage
    Accessory #3 Adata USB3.1 512Mb SSD @480Mb ul/dl

    Join Date
    Mar 2018

    Hi there,

    the voltage is really good for 32 GB. Would be far higher with 3200 instead of the measly 2400 you are running.
    The LN2 stats you are referring to are no reason to think that your rig runs hot.
    32Gb always stresses the system.

    .. I hope i am allowed to link to an asus article on the edge up site:

    In the middle of the article is an overview about VCCIO and system agent voltages in relation to the RAM beeing used.

    Anything above 1.25 is high and will be marked with purple color in your Bios.

    I run VCCIO at 1.2 and System Agent at 1.175 with just 16Gb.

    I did try a lot of voltage variations until i came up with the numbers above.

    I used Cinebench to find my personal sweet spot.

    I do not recommend my stats. Kindly do the works and find your own sweet spot.

    XMP in itself is an overclock setting and will not run with JEDEC standards (DDR4-2133) mentioned als standard voltage values in the Bios .
    Thats why your values have been overclocked by simply choosing "XMP" to the values you are now worried about.

    If you like you can run your RAM @2133 and with voltage values pretty close to "standard". Or at least they should run with them ;-)


    Nevermind my shady explanation. There are at least two better articles in this very forum abut this.
    Last edited by Carlyle2020; 07-04-2018 at 07:32 PM.

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