Y740 undervolt - strange ThrottleStop behavior

Discussion in 'Lenovo' started by notfunny, Aug 6, 2019.

  1. notfunny

    notfunny Notebook Guru

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    When comparing my machine temps to what other people reported, I have noticed that my CPU temps were by 8-10 degrees higher in CPU intensive tasks.
    I tried undervotling however at first I've just got better CPU clocks, but after -180mv on core, when it reaches the maximal boost clocks, there is no change in temps or performance. I was able to go down until -240mv without performance loss and BSOD, however there was no difference in temperatures, my temperatures are still in mid 80s during Aida64 test and around 90C under combined GPU + CPU test, when in performance mode. (GPU temps are still fine, as well as performance - I get around 7800-7900 on TimeSpy and run TW: Three kingdoms under ultra settings with good fps). However the only way to get temperatures down is to limit the CPU clocks, then I do get temperatures similar to what other people report on this laptop).
    1. Wondering what causes my relatively high temps.
    2. Is there any way to bring them down.
    3. Why undervolting doesn't seem to affect the temperatures?

    Thanks.
     
  2. RhyStar

    RhyStar Notebook Consultant

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    Those temps are not unusual under stress testing... and under Volting is not guaranteed to drop 10c off.

    The thermals on a machine and the fans define how good you can get. You also might want to look into repasting the CPU but that isn’t for the faint at heart.

    Have you checked game performance with slower clock speeds? To be honest, you don’t need to peg your cpu at max turbo for full quality.

    I had forgotten to turn on my turbo boost after testing and played division 2 for hours without noticing performance hits.

    Try dropping your cpu stepping down so the max turbo speed drops (in my case from 4.2ghz to about 3.5ghz) and this will cool things off.

    But if you insist on highest possible benchmarks, your best bet is a laptop cooling pad....

    R
     
  3. Papusan

    Papusan JOKEBOOK's Sucks! Dont waste your $$$ on FILTHY

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    And you have put same undervolt on Core and Cashe. You say no BSOD and performance loss with even -240mv. Try that on both Core and Cashe. Post results.
     
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