Plundervolt bios mods (workaround) for Zbook models?

Discussion in 'HP Business Class Notebooks' started by SamuelL421, Aug 3, 2021.

  1. SamuelL421

    SamuelL421 Notebook Geek

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    Does anyone know if there has been work done on plundervolt workarounds for newer Zbooks? I've got 2 G6 models on hand, a 15 and a 17, both fortunately have the earlier 2019/original bios that allow for undervolting. But there were some fixes put in place later that corrected coil whine from the LED backlights of the keyboard. Those fixes of only exist in the post-plundervolt updates :mad:. Limited ability to test as moving to the November 2019 or newer bios would prevent rollback to the original bios (that is, without sending in to HP support for a motherboard replacement, I **** you not...).

    I'm thinking of mods in line with these I saw on reddit for Lenovo/thinkpads or this workaround for Dell/Precision notebooks:

    https://www.reddit.com/r/Lenovo/comments/id0457/guide_to_reenable_undervolting_after_latest_bios/
    https://www.reddit.com/r/Dell/comme...ck_undervolting_and_remove/g03uxxk/?context=3

    Anyone know if any work has been done like this toward re-enabling on Zbooks (G5, G6 or otherwise) ?
     
  2. TheQuentincc

    TheQuentincc Notebook Evangelist

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    you should be able to do the same thing as on Lenovo/Dell because it's an nvram edit, you just need to find out the right "adress" in the IFR file that you need to make yourself, then it's following the tutorial
     
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  3. Alyosha2001

    Alyosha2001 Newbie

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    I'm in the same situation with a Zbook 15 G6, after updating the BIOS cannot revert backand cannot undervolt. Still no solution?
    I have acces to chip writers
     
  4. SamuelL421

    SamuelL421 Notebook Geek

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    None that I have found, I spent considerable time scouring for any leads - some progress made by others on lenovo and Dells - nothing regarding HP. I'm lucky enough to have two G6s that have never been updated past their stock BIOS... but the lack of some of the later optimizations/fixes on my Zbook 17 G6 is a big trade-off just to keep access to undervolting I may be forced to upgrade it at some point. In particular there is only one setting/combination of keyboard backlight settings I can enable with the stock BIOS or else I get awful coil whine coming from somewhere under the keyboard. I have the 2286 in the 17 and it is a real beast even without the undervolt however.
     
  5. Alyosha2001

    Alyosha2001 Newbie

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    Could you send me the full BIOS dump for 01.02.02? I cannot find it anywhere, neither in China. I am looking for it for more than half a year now. I want to downgrade, because I don't have that coil noise, and I use it for video graphics and editing, and undervoltig is very important to me.
    PS: what are the issues you are talking about with 01.02.02?
    Thanks!
     
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