Will 2020 BIOS updates disable undervolting on the XPS?

Discussion in 'Dell XPS and Studio XPS' started by pressing, Feb 13, 2020.

  1. pressing

    pressing Notebook Deity

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    I am running a Dell XPS 9550 (6300HQ) on a recent BIOS 1.12.0 dated 3 oct 2019. It still undervolts fine, with ThrottleStop's FIVR screen showing uCode 0xCC.

    Dell has a newer BIOS 1.13.1 dated 6 jan 2020. I have not tried that lol.
    There is more detail on undervolting challenges on 2020 BIOS updates at the ThrottleStop thread.
     
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  2. _sem_

    _sem_ Notebook Deity

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    I think this BIOS doesn't include Plundervolt mitigation yet (INTEL-SA-00289). Haven't applied it yet though.

    Dunno about the future of undervolting. I guess just disabling is over-reaction or maybe acceptable as a temporary measure. Less severe restrictions should probably work for disabling the exploit. I recall Intel did supply patches with less severe performance impact after a while for some of the previous vulnerabilities.
     
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  3. Techland

    Techland Notebook Consultant

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    I have that latest BIOS, a i5 6300HQ, and undervolt by 115 mV. According to Intel XTU and HW Monitor that still works.
     
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  4. pressing

    pressing Notebook Deity

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    Thanks guys. I just updated to 1.31.1 (dated 6 jan 2020) which is the latest BIOS showing for my system and undervolting still works fine.
     
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