Windows 10: HPET automatically re-enabling itself after every startup

Discus and support HPET automatically re-enabling itself after every startup in Windows 10 Performance & Maintenance to solve the problem; Hello, One of the games I play (Warthunder) only runs smoothly when the High Precision Event Timer is disabled through the elevated cmd command:... Discussion in 'Windows 10 Performance & Maintenance' started by ost, Aug 20, 2015.

  1. OST
    ost Win User

    HPET automatically re-enabling itself after every startup


    Hello,
    One of the games I play (Warthunder) only runs smoothly when the High Precision Event Timer is disabled through the elevated cmd command:

    Code: bcdedit /deletevalue useplatformclock[/quote] After the command completes, I restart. At this point, HPET has been successfully disabled and everythings fine. But for some reason every time I restart without entering the CMD command beforehand, it turns itself on again. Is this an intended effect, and is there any way I can keep HPET disabled throughout multiple restarts?

    Also, in the BIOS, there is an option called ACPI HPET table, which was by default enabled. I tried disabling it but it seemed to have no effect on whether HPET was enabled or disabled.

    Thanks for your help.

    :)
     
    ost, Aug 20, 2015
    #1
  2. BULLDOGXX
    BulldogXX Win User

    Windows Defender 10

    Windows Defender does automatically update itself and run scans in the background, unless you disable it in Settings. And even then it will automatically re-enable itself after a while.
     
    BulldogXX, Aug 20, 2015
    #2
  3. CDNKIWI
    CDNKIWI Win User
    Enabling HPET with Windows 10

    Hi Aswin,

    Apologies I should have provided more detail.

    I am referring to the High Precision Event Timer. There is conflicting information out there and I wanted to clarify something with respect to Windows 10 and how it handles this.



    I am running Microsoft Windows 10 Professional Build 10586 on an SanDisk SSD with a ~5 year old GIGABYTE P55A-UD4P motherboard; GIGABYTE GeForce GTX 460 GPU; 8GB Dual-channel DDR3.



    In this post:

    Windows 10 - disable HPET before install and enjoy low latencies! - Overclock.net - An Overclocking Community
    MonarchX states:

    When HPET (High Precision Event Timer) was enabled in BIOS, Windows 8.1 would automatically use it and install system device driver for it. Now I advice to disable HPET because even if you have it enabled in BIOS, Windows
    10 won't use it by default, but it will install the system device driver for it. That is GOOD news because Windows 10 finally switched to some other (new?) method of handling latencies and it works much better than HPET!

    So the questions are as follows:

    Does Windows 10 have its own implementation of the High Precision Event Timer superseding the built in HPET enabled in the BIOS of certain motherboards?

    If that is the case then I will disable HPET.

    If that is not true and Windows 10 can still use HPET, then I want to know if it has to be enabled both in the Bios and by modifying the Boot Configuration Data (BCD) store. Because
    in this post and others I have seen:

    MWO: Forums - Massive Fps Improvement Through Enabling Hpet In Bios And Win10

    They state:

    To enable it in Windows 10, with administrative priviledges you must modify BCD

    bcdedit /set useplatformclock true

    Thank you for taking the time to answer this question.
     
    CDNKIWI, Aug 20, 2015
    #3
  4. RED5GOAHEAD
    red5goahead Win User

    HPET automatically re-enabling itself after every startup

    me too, since I had Windows 7. Also on my system the useplatformclock even with hpet on bios disabled cause freeze.

    It's unbeliaveble that a parameter for debug purpose (said by Microsoft) it's enabled by default maybe by the Amd drivers.
     
    red5goahead, Sep 6, 2015
    #4
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HPET automatically re-enabling itself after every startup

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