Is underclocking a cpu power efficient?

Discussion in 'Alternatives to iOS and iOS Devices' started by theapplefanboyj, Oct 29, 2014.

  1. theapplefanboyj macrumors 6502a

    Mar 1, 2014
    I underclocked my opo to min 312mhz and max 1574mhz. Is this power efficient? Does it save power compared to the 2500mhz of the normal cpu? I don't game much so it should be okay.
  2. Savor Suspended


    Jun 18, 2010
    Download this app called CPU Identifier. There is a page there that mentions Frequency States.

    From my experience on my Xiaomi, NO. I go HIGH PERFORMANCE most of the time. I see no difference in SOT. Only when I do game do I put it on Battery Saving Mode to keep the battery temperature under 108 F.

    Power savers is better for standby time or if you are a light user. You buy a phone with a fast CPU, you might as well let it go full throttle. Crippling their speed is no fun and can create lag here and there. It would be like buying a motorcycle or Ferrari but driving it below the speed limit.
  3. MRU Suspended


    Aug 23, 2005
    The CPU's in modern smartphones don't run at their flat out full core CPU GHZ unless taxed, they will normally step down regardless.

    All underclocking does is allow it to step down further or not reach as high.

    I would just stick to how the device is meant to be used - and switch off some background stuff such as google now (especially location history) and turn your emails from PUSH checking to automatic 30mins instead. Turn off bluetooth if your not using it, likewise GPS.

    Simple things like that will garner better battery life than messing around under clocking the cpu and potentially putting the device in harms way.

    Besides you have a one plus one. You should be able to get a decent day of heavy usage out of it - unless your one of the affected users where the new firmware reduced battery life, in which case no amount of under clocking will help, you just need cyanogen & oneplus to fix it.
  4. diamond.g macrumors 603


    Mar 20, 2007
    Undervolting is more useful than underclocking. But the level of undervolting depends on the sample quality of the cpu in your phone. Some phones can reduce the voltage by a lot, others, not so much.
  5. danthe93 macrumors member


    Oct 31, 2014
    underclocking = less power usage. So yeah, you'll have longer battery life, but sluggish performance.
  6. TimelessOne macrumors regular

    Oct 29, 2014
    It is a trade off. Pretty much all modern CPU will underclock more so they underclock by reducing their multiplier. Yeah it saves power to a point but the issue you run into is if you have something that requires a lot of processing power well you increasing the time it might be at the higher multiplier which will drain more power.

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