Intense NP8173/ P670RS CPU throttling. (6820hk/gtx1070)

Discussion in 'Sager and Clevo' started by zamoeba, Aug 26, 2016.

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  1. zamoeba

    zamoeba Notebook Enthusiast

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    When the GPU does just about anything, the CPU throttles via ICCmax/PL4.

    CPU drops about 800mhz. Undervolting the CPU helps a little, but it does not really address the problem.

    There is a shared power usage between the two components that cannot get above a certain level.

    Does anyone know how to circumvent this or anything about it?
     
  2. sirana

    sirana Notebook Deity

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    Repaste the thermal compound with something like IC Diamond and hit FN+1 to use full fan mode.
     
  3. Anddo24

    Anddo24 Notebook Consultant

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    Keep us updated. I ordered the NP8173-s (6820hk/gtx1070) combo.
     
  4. wickette

    wickette Notebook Deity

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    - Check temps
    - Do you have by any chance the 200W PSU and not the 230W ?
     
  5. zamoeba

    zamoeba Notebook Enthusiast

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    It's not temp throttling, and if it were the power supply, the adapter would just die, not downclock the CPU. I'm using a 330w anyway.

    The dips in Freq/Power near the middle. That's just from starting to watch a game of dota 2.
    The processor is completely fine if it's only doing processor things.



    upload_2016-8-27_7-16-48.png
     
  6. hfm

    hfm Notebook Prophet

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    Are you sure it's not downclocking just because it doesn't need to be clocked that high? It doesn't look like usage changed much. I think it's a power conservation algorithm possibly, because it doesn't need to be clocked as high to do what it's doing. What happens under higher loads? I would imagine the clock rises maybe with more demand?

    I'm wildly guessing, probably incorrect. ;)
     
  7. zamoeba

    zamoeba Notebook Enthusiast

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    Yes I am absolutely sure.

    When I Cap FPS to 60, the clocks on the CPU remain fine.

    When I bench CPU during significant GPU usage, it will never reach 4ghz, usually around 3.3ghz.
     
  8. wickette

    wickette Notebook Deity

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    I see 2 reasons :
    1) Maybe a bios/ec bug :) ? I remember my previous P650SG with a 980M had some annoying EC bugs in the beginning.
    2) Maybe a TDP limit on the i7 + Nvidia GPU ? After all Nvidia and Intel are allowing manufacturers to select their own TDP/limit.

    Anyway thanks for the infos ! Many people are eagerly waiting for their P6x0RS with 1070 ^^ any feedbacks or infos on thermal/benchmark you have would be a great addition !
     
  9. zamoeba

    zamoeba Notebook Enthusiast

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    Somewhat unsure how to benchmark.

    Here's a 3dmark 11 score?
    http://www.3dmark.com/3dm11/11529806

    Max CPU/GPU temps were 71/64 Celsius.

    CPU was at 4.1ghz but throttled itself between 3.4 and 3.7 during various benchmark tests.
     
  10. wickette

    wickette Notebook Deity

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    benchmarking can be done with 3Dmark, unigine heaven, measuring fps in games etc. WHILE measuring temps/frequency.

    So that's what you did ^^ and thank you ! That's weird, I'm really leaning toward a bios bug /bad power management/TDP limit in EC regarding those dip in CPU frequency. When I'll get mine i will test this should get it in a week or more.

    your 3Dmark score should be in the 15000 area it's pretty close so that's good (and that would explain the dip in cpu frequency), your temps are excellent.
     
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