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    Is it possible to disable HPET in the BIOS?

    Discussion in 'Sager and Clevo' started by Question2, Nov 30, 2016.

  1. Question2

    Question2 Notebook Consultant

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    According to dxdiag, my notebook is the Clevo P15SM. I want to try disabling the high precision event timer in the BIOS to test something, but i cannot find the option anywhere in the BIOS, and the BIOS settings are poorly explained.

    Anyone have any idea?
     
    Question2, Nov 30, 2016
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  2. Meaker@Sager

    Meaker@Sager Company Representative

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    It is not an option in the standard BIOS, the Prema unlocked version may expose it if it is there, just be aware this can impact your warranty if you have any remaining.
     
    Meaker@Sager, Nov 30, 2016
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  3. i_pk_pjers_i

    i_pk_pjers_i Even the ppl who never frown eventually break down

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    What would you like to test by disabling that? It's pointless to disable it in 99% of cases.
     
    i_pk_pjers_i, Dec 1, 2016
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  4. Question2

    Question2 Notebook Consultant

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    Im trying to test whether it is affecting the speed of a certain source engine game. When i enabled HPET in the OS and restarted, the game suddenly ran much faster which is very strange.

    I have Prema's BIOS but i dont see any option in the BIOS for HPET, but then again there is no documentation that explains what the options in the BIOS do. Does anyone have any idea what it would look like? I tried sending Prema an email through his website and on the techinferno forums, but he didnt reply. I can see he read my PM on the techinferno forums, but then he disabled his forum messenger a few days later without replying.
     
    Question2, Dec 15, 2016
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  5. i_pk_pjers_i

    i_pk_pjers_i Even the ppl who never frown eventually break down

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    Hmm, interesting. I've never had any issues running source engine games even on my older laptops like my MSI with a 765m GT.
     
    i_pk_pjers_i, Dec 15, 2016
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  6. Mr. Fox

    Mr. Fox BGA Filth-Hating Elitist®

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    This is something you can do in Windows without a BIOS setting. It typically does not have a huge influence on performance, but it can help with goofed up RTC-related performance issues with W8.X and W.10 if you have a pre-Skylake CPU.

    See this here: https://www.neowin.net/forum/topic/...n-bios-and-os-for-better-performance-and-fps/

    You can use these commands from an elevated command prompt (Admin) to enable or disable HPET.
    Code: 
    bcdedit /set useplatformclock true (then reboot) enable HPET
bcdedit /deletevalue useplatformclock (then reboot) disable HPET
    Or use this tool, which I have been using for a long time. http://www.lucashale.com/timer-resolution/
     
    Mr. Fox, Dec 16, 2016
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    i_pk_pjers_i likes this.
  7. Question2

    Question2 Notebook Consultant

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    Yes, as I mentioned, i enabled it in the OS and I saw some rather odd behaviour. It's disabled in the OS by default, but apparently you need to disable in the BIOS to 100% disable it. That's why I was trying to disable it in the BIOS to do some testing.
     
    Question2, Dec 16, 2016
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  8. Mr. Fox

    Mr. Fox BGA Filth-Hating Elitist®

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    I am pretty sure HPET is more of a Windows RTC thing, not a BIOS thing. HPET got screwed up by Micro$loth after Windows 7. Maybe someone is referring to base clock or spread spectrum as HPET?
     
    Mr. Fox, Dec 17, 2016
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