Overclocking the i7-8750H in the Spectre x360 15t-df000?

Discussion in 'HP' started by jenesuispasbavard, Jun 23, 2019.

  1. jenesuispasbavard

    jenesuispasbavard Notebook Evangelist

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    Back to these forums after six years of desktop usage! Switching back to a laptop, this time with an eGPU setup.

    Any idea why my XTU settings aren't sticking? Still hitting current limit throttling... HP Spectre x360 with i7-8750H stuck at 42W (see graph), despite power max set to 55W and current limit set to 200A (from the 45W and 128A defaults). Stuck at a sub-1000 Cinebench R15 score, the horror.

    Is the power limit fixed to ~42W in the BIOS or something? If so, what else can I try to eke out as much CPU performance from this CPU?

    2019-06-21.png
     
  2. Vasudev

    Vasudev Notebook Nobel Laureate

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    Uninstall XTU and Use ThrottleStop with R/W Everything driver to set max TDP and current limit and forget about throttling.
    H series aren't overclockable and you can set only high TDP and current values. If you have unlocked BIOS then BCLK might be overclockable to certain extent.
     
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  3. jenesuispasbavard

    jenesuispasbavard Notebook Evangelist

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    Right, by overclocking I meant raising TDP so that the sustained clock is higher. Right now at 42W it settles around 3.0-3.1 GHz all cores.

    Thanks; I'll check out the R/W Everything driver. Won't that driver enable me to make the same changes in XTU too? I like the interface so much more than Throttlestop's.
     
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  4. TheReciever

    TheReciever D! For Dragon!

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    Throttle retains functions that have been omitted from XTU, like more granular voltage offsets for starters.

    To each their own though.
     
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  5. jenesuispasbavard

    jenesuispasbavard Notebook Evangelist

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    Any idea where I go into R/W Everything to set the max TDP for this laptop? Not sure which register(s) to use in the CPU MSR table or the EC table.
     
  6. Vasudev

    Vasudev Notebook Nobel Laureate

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    I don't know the correct regions, I just use TS and RWdrv.sys driver that unclewebb included in TS folder that points to Mega.nz
    @unclewebb can help you.
     
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