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Thread: Enable or disable the ACPI HPET table?




  1. #1
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    Default Enable or disable the ACPI HPET table?

    Not sure whether I should enable or disable ACPI HPET Table since I do not know what it does.

    I have disabled all the other ACPI stuff.
    What does ACPI HPET table do?

  2. #2
    therube is offline Member
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    Default Re: Enable or disable the ACPI HPET table?

    What board?
    What OS?

    > I have disabled all the other ACPI stuff

    Why?

    > ACPI HPET

    What is the default setting for this in the BIOS?

  3. #3
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    Default Re: Enable or disable the ACPI HPET table?

    ASRock Z77 OC Formula
    Win 7 64 Pro

    I disabled the other ACPI stuff with the thinking that it's generally best to disable any services you are not using, in order to prevent resources and power from being diverted/wasted.

    The default setting for ACPI HPET table on this mobo is ENABLED.

  4. #4
    tux9656 is offline Junior Member
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    Default Re: Enable or disable the ACPI HPET table?

    ACPI is Advanced Configuration and Power Interface. Read the article on Wikipedia to understand what it does. In general, you shouldn't change settings in the BIOS unless you understand what the setting does. In this case disabling ACPI is likely increasing the system's power consumption.

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    Default Re: Enable or disable the ACPI HPET table?

    Quote Originally Posted by tux9656 View Post
    ACPI is Advanced Configuration and Power Interface. Read the article on Wikipedia to understand what it does. In general, you shouldn't change settings in the BIOS unless you understand what the setting does. In this case disabling ACPI is likely increasing the system's power consumption.
    Thanks for replying. I agree that you shouldn't change settings in BIOS unless you know what the setting does. That's why I'm asking what the ACPI HPET table does.

    I already read the ACPI Wikipedia article. It doesn't address my question.

  6. #6
    tux9656 is offline Junior Member
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    Default Re: Enable or disable the ACPI HPET table?

    HPET is High Precision Event Timer. It is an interrupt timer that runs at a high frequency that allows the system to be more responsive by allowing the hardware to respond sooner to requests. You would most certainly want to keep this enabled.

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    Default Re: Enable or disable the ACPI HPET table?

    Here is a little tweak.

    By default Windows 7 uses different timers in the CPU to calculate stuff. HPET is the newest and best of these timers, but because of default combination of timers it takes longer time for CPU to keep up all the timers and sync between them. Forcing Windows to use HPET only improves performance and leads to greater FPS.

    Steps to enable this tweak:

    1. Enable HPET in BIOS. If you have HPET option in BIOS then your hardware can support HPET.

    2. Enable HPET in Windows by giving this command in admin credential CMD:
    bcdedit /set useplatformclock true

    3. Reboot

  8. #8
    therube is offline Member
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    Default Re: Enable or disable the ACPI HPET table?

    I read that very same quoted content. (It is all over.)
    The particular link I read (I was on a different computer at the time) then followed with contrary opinions regarding that "tweak".
    So of course anything like that is going to be YMMV.
    Defaults are defaults - for a reason ;-).

    I'm all for a change if it solves a particular problem.
    But me, I wouldn't notice 1/1000th of a ms ...

  9. #9
    Akis is offline Junior Member
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    Default Re: Enable or disable the ACPI HPET table?

    You can use a latency monitor like Resplendence Software - LatencyMon: suitability checker for real-time audio and other tasks to see if theres any difference but i advise you to close all powersave function from bios before you do it else you might get false informations.

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