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    Why does the 8250U require such a high voltage?

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by Che0063, Apr 2, 2018.

  1. RampantGorilla

    RampantGorilla Notebook Deity

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    Most CPUs will crash if you go below 600 mV - it's simply because of the silicon. The problem with the 7700HQ and i5 8250U is that they are based on the same architecture which has to scale from 130W+ to as low as 300 mW. Intel has done a remarkable job here, but an architecture designed from the ground up for power efficiency like Goldmont Plus (low price & performance) will perform a lot better in terms of battery life.
     
    RampantGorilla, May 2, 2018
    #101
  2. Maleko48

    Maleko48 Notebook Deity

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    Umm, at this point I think you guys are chasing your tails a bit. 0.3W to 0.5W is quite acceptable. Tame your background processes, tasks, auto starts, etc. You are getting C7+ already.
     
    Maleko48, May 2, 2018
    #102
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  3. Che0063

    Che0063 Notebook Evangelist

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    I can confirm that, on idle clocks, the 8550U runs at about -200mV lower than the 8250U. The 8550U idles at ~0.65v whereas the 8250U does ~0.83v on stock settings.
     
    Che0063, May 3, 2018
    #103
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  4. hmscott

    hmscott Notebook Nobel Laureate

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    Thanks for that observation, if every thing else is equal that may be a sign that those CPU's don't need as hot a CPU voltage for the full range of samples being seen, so the BIOS has reduced the voltage.
     
    hmscott, May 3, 2018
    #104
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