no difference after undervolting ? 10875H

Discussion in 'Hardware Components and Aftermarket Upgrades' started by jojonono, Nov 16, 2020.

  1. jojonono

    jojonono Notebook Guru

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    hi guys

    am new to this undervolting thing,

    on my GS75 stealth i have a 10875H, so i thought id undervolt it to get lower temps, I KNOW this chipset cant get very low undervolt values so i was recommended to start with -0.50mV, and this is what i did, only i did Not see any difference in terms of temps, it feels like no changes happened !

    b4 undervolt:
    https://ibb.co/b3kPLwP

    after:
    https://ibb.co/DgRFPqV

    also how to go about increasing the voltage value without bricking the laptop ?...

    thanks,
     
  2. 4W4K3

    4W4K3 Notebook Evangelist

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    If you are using Intel XTU for undervolting you will need to match Core and Cache undervolt. I do not believe you can have them at different values. -.50mV is a good place to start but may be only a degree difference if that. If you match core and cache and still don't see a difference try -.75 or a bit higher and watch voltage/temps.

    If that is still not working I'd recommend uninstalling Intel XTU and give Throttle Stop a try. There is a support thread here on this forum that can guide you as to setup/use. http://forum.notebookreview.com/threads/the-throttlestop-guide.531329/
     
  3. Charles P. Jefferies

    Charles P. Jefferies Lead Moderator Super Moderator

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    It is possible that your processor does not support undervolting. Try ThrottleStop, it will tell you if undervolting is available. Uninstall XTU and restart before installing ThrottleStop.

    There is still hope to improve thermal performance without undervolting. You can apply better thermal paste and use ThrottleStop to tune the Turbo power limit (TPL) values.

    Ask in the ThrottleStop thread if you need some help with it.

    Charles
     
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  4. jojonono

    jojonono Notebook Guru

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    I unlocked the cpu in advanced bios settings and TS doesnt say its locked ANYMORE but for some reason core voltage is greyed out in XTU !... maybe u guys can help ?!...
     
  5. tilleroftheearth

    tilleroftheearth Wisdom listens quietly...

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    Don't run both programs at once.

    Better yet, uninstall XTU.
     
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  6. senso

    senso Notebook Deity

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    There is a difference, power went down by around 5W, its just that your CPU is still using 83W, if thats with -50mV, go down a bit more, but 83W on that thin chassis will lead to high temps..
     
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  7. jojonono

    jojonono Notebook Guru

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    Thanks senso, am only worried id brick my laptop if i lower the voltages any lower, also i still cant get xtu to work which is supposed to be safer than TS, anyways, how to go about lowering my voltages with TS ?, small decrements till it crashes or i get a BSOD then increase again ? And what will happen if i go lower tha what the cpu requires, will i brick it permanently or will bios restore last working voltage etc ?!...

    Thanks again,,,
     
  8. senso

    senso Notebook Deity

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    With TS, if it crashes, there is no risk of bricking, because it only applies the undervolt after windows boots, and when it detects a crash it will ask you if you want to keep the undervolt or discard it, TS is smart, XTU not so much...

    Undervolt core and cache in steps, start with -80mV core, and -50mV cache, and leave cache untouched for now.

    And if its an MSI laptop, press the power button for 40s and it resets the BIOS settings.
     
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  9. jojonono

    jojonono Notebook Guru

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    well, i dunno but something is not right here, i reduced the voltages all the way down to -0.125 mV, no temp difference whatsoever, in neither stress tests NOR in gaming !... not sure whats wrong, it the new temps show up in HW Monitor but 0 effect ! also i know for sure the 10th gen cant really go down to 0.125 mV
    settings:
    http://grabilla.com/0ab11-184eeab2-10ee-49b7-ad79-92c869425991.png

    http://grabilla.com/0ab11-dec8df37-c2aa-4966-b1ec-ab10dee40842.html

    http://grabilla.com/0ab11-82aa2eb6-fa60-465e-aec5-92d51fffc60e.html

    i will simply assume that undervolting the 10th gen is just non existing !...
     
  10. unclewebb

    unclewebb ThrottleStop Author

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    Exactly.

    You already proved that undervolting a 10th Gen works correctly.

    If you really think that your undervolt is not working then keep going. Try -150 mV for the core and cache offsets then -175 mV for both and then -200 mV. If your computer crashes, I would conclude that the undervolt really is working. Run a light load 1 or 2 Thread TS Bench test along the way. See if it reports any errors. It usually does when you go too hard on the cache undervolt.

    When exploring the outer limits of what voltages your CPU can handle, open the FIVR window and select the option, OK - Do not save voltages. This is a good safety feature. If your computer crashes while testing, when you boot back up and run ThrottleStop, the voltages you were testing will have been forgotten.

    https://ark.intel.com/content/www/u...0875h-processor-16m-cache-up-to-5-10-ghz.html

    You are pulling 90W from a CPU that has a 45W TDP rating. What are your expectations? Any laptop heatsink and fan are going to struggle trying to continuously dissipate that much heat. It would be normal for your CPU temps to go up over time while gaming or running any stress test.

    Instead of overwhelming your CPU with Prime95, try a more practical test like Cinebench R20 or R23.
    https://www.maxon.net/en/cinebench

    Do a baseline run with the core and cache set to +0.0000 and then do another run with the core and cache at -125 mV. If you are stable, keep adjusting only the core to -150 mV, -175 mV, -200 mV and -225 mV. All of the 8th and 9th Gen CPUs show an improvement in temps or performance when testing like this. If you lose stability or a light load TS Bench test shows errors, back the cache voltage off a little first. It tends to be the limiting factor.

    It looks like your laptop is running great. You are maintaining the full 43.00 multiplier when fully loaded. That is as good as it gets for a 10875H.
     
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