How to enable S3 on Asus newer boards ?

Discussion in 'BIOS Mods' started by ceo54, Feb 12, 2026.

  1. ceo54

    ceo54 MDL Addicted

    Aug 13, 2015
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    Hello,

    From powercfg /a, I get this
    Code:
    C:\Users\cashback>powercfg /a
    The following sleep states are available on this system:
        Standby (S0 Low Power Idle) Network Connected
    
    The following sleep states are not available on this system:
        Standby (S1)
            The system firmware does not support this standby state.
            This standby state is disabled when S0 low power idle is supported.
    
        Standby (S2)
            The system firmware does not support this standby state.
            This standby state is disabled when S0 low power idle is supported.
    
        Standby (S3)
            This standby state is disabled when S0 low power idle is supported.
    ACPI has S3, disabled because firmware is forcing modern standby. I looked everywhere in BIOS, couldnt find any related option to disable modern standby/enable S3, the closest possible thing was ERP which is disabled.


    I flipped Fast Startup to disabled and also Asus Control interface but that didn't expose the hidden toggle neither disabled the modern standby.

    Anyone has any idea how cann this be accomlished ?

    Any help will be greatly appreciated.

    Firmware: American Megatrends.
     
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  2. kaljukass

    kaljukass MDL Guru

    Nov 26, 2012
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    #2 kaljukass, Feb 12, 2026
    Last edited: Feb 13, 2026
    As far as I know, there is no way to disable it, and older modes cannot be re-enabled.
    It has been tried, but they have not been stable.
     
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  3. ceo54

    ceo54 MDL Addicted

    Aug 13, 2015
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    [ S3PT: S3 Performance Table ]

    ACPI Table Properties:
    ACPI Signature S3PT
    Table Description S3 Performance Table
    Memory Address 00000000-6D593000h
    Table Length 52 bytes



    [ LPIT: Low Power Idle Table ]

    ACPI Table Properties:
    ACPI Signature LPIT
    Table Description Low Power Idle Table
    Memory Address 00000000-71AAD000h
    Table Length 204 bytes
    OEM ID _ASUS_
    OEM Table ID Notebook
    OEM Revision 01072009h
    Creator ID AMI
    Creator Revision 01000013h

    There's an instruction somewhere that is forcing modern standby, I need to find it and flip it.
     
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  4. Carlos Detweiller

    Carlos Detweiller Emperor of Ice-Cream
    Staff Member

    Dec 21, 2012
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  5. ceo54

    ceo54 MDL Addicted

    Aug 13, 2015
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