High vs balanced power plan

Discussion in 'Processors and motherboards AMD' started by Amaze, May 18, 2018.

  1. Amaze

    Amaze Ancient Guru

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    Funny thing I noticed with my 2600. With balanced plan my core speed fluctuates from 1500-3900.
    With High Performance it stays at 3700-3725 at all times, never boosting to 3900.

    Why is this?
     
  2. mbk1969

    mbk1969 Ancient Guru

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    May be with Performance power plan CPU is constantly hotter and some limit kicks in?
     
  3. Amaze

    Amaze Ancient Guru

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    Don't think so. Idle temp is more or less the same at 28c. Load never gets above 50c for either.

    Maybe because high performance boosts all cores while balanced boosts random cores there is some limit to simultaneous core boost?
     
  4. GroinShooter

    GroinShooter Master Guru

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  5. mbk1969

    mbk1969 Ancient Guru

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    Windows has many hidden power plan settings. All of them can be unhidden through registry editing. I made utility to explore power plan settings - https://forums.guru3d.com/threads/windows-power-plan-settings-explorer-utility.416058/
    You can unhide settings with it, and you can edit settings` values with it (not bothering with unhiding). Also it is helpful for comparing values between power plans.

    There are two hidden settings concerning turbo boost:
    Processor performance boost mode (be337238-0d82-4146-a960-4f3749d470c7) - Specify how processors select a target frequency when allowed to select above maximum frequency by current operating conditions.
    Processor performance boost policy (45bcc044-d885-43e2-8605-ee0ec6e96b59) - Specify how much processors may opportunistically increase frequency above maximum when allowed by current operating conditions.

    Check them just in case. I do not believe that they are the culprit, but who knows.

    PS Useful benchmark tool http://www.geekbench.com/index.html
     
    Last edited: May 18, 2018
    fantaskarsef likes this.
  6. Amaze

    Amaze Ancient Guru

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    It's Windows' plan.

    Does the tool work for win7 or just 10?
     
  7. mbk1969

    mbk1969 Ancient Guru

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    For Win7 it can`t edit values, so you can only see them all and unhide for editing in Windows Advanced power plan settings dialog.
     
  8. mbk1969

    mbk1969 Ancient Guru

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    If you are on Win7 be aware of core parking. I saw rigs where core parking was in effect even in Performance power plan.
    Overall power management starting with Win8 is better than in Win7.
     
  9. Amaze

    Amaze Ancient Guru

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    I can only see boost policy in your tool, not any boost mode. It's set to 100% though.
    None of the cores get parked in performance mode. So I don't get why it doesn't boost as high as in balanced mode, where core parking is enabled.
     
  10. Fox2232

    Fox2232 Ancient Guru

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    There is option which decides if CPU is self governed or OS is controlling it. That may be cause.
     

  11. Amaze

    Amaze Ancient Guru

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    I'm not sure what you mean. It's using Windows' power plan so it is controlled by OS.
     
  12. Fox2232

    Fox2232 Ancient Guru

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  13. Amaze

    Amaze Ancient Guru

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    That is for Win10. Win7 doesn't have that issue,
     
  14. mbk1969

    mbk1969 Ancient Guru

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    Most probably CPU just has limiting algorithm which is activated on some conditions (like all cores boost).

    But also it can be incompatibility of old OS with new CPU.
     
  15. fantaskarsef

    fantaskarsef Ancient Guru

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    Because performance power plan doesn't allow massive downclocking, only respecting TDP and temp limits. I only use performance power plans since years because I can't be bothered with lags and slideshows while windows is still wondering if it should switch to a higher performance state while I wait for a level to load etc.
     

  16. mbk1969

    mbk1969 Ancient Guru

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    @Amaze Btw have you disabled c-states in BIOS?
     
  17. bernek

    bernek Maha Guru

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    Can someone please enumerate the bare mininum bios settings for a decent OC on Ryzen ?

    I have a Ryzen 3 1200 currently at 3.8 GHz and Windows 10 reports it running at 3.0-3.2 GHz ... (CPUID reports 3.8 and MSI Afterburner also 3.8).

    I have disabled C6 state in BIOS and I'm not sure if I should leave boost on or off. I disabled it and set the multiplier to get 3.8 at 1.275v ...

    There is a setting for throttle down (I forgot it's name something related to relaxed throttling and I enabled it - from the description is said that the Ryzen will throttle less often).

    What else should I look for ?
     
  18. Amaze

    Amaze Ancient Guru

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    That doesn't explain why it won't boost higher though.

    Yeah made no difference.
    It's funny, I've never seen any reviews mention that performance mode doesn't boost as high as balanced mode.
     
  19. mbk1969

    mbk1969 Ancient Guru

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    In Win7 power plan only controls the percentage of core allowed to boost. In Win8 they added ability to control the policy of boost. Aside from that power plan controls P-states and C-states. And that`s it. Behaviour you describe is a thing completely intrinsic to CPU, imo. May be the sum of settings in BIOS (may be hidden ones) results in such limited boost when all cores are boosted.
     
  20. mbk1969

    mbk1969 Ancient Guru

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    Btw, have you tried to set this setting to 50% or 75% (in performance power plan)?
     

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