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    Home Unlabelled Hardware support: Why haven't we seen really significant battery life gains on mobile processors despite constant improvements in "efficiency" with every iteration?

    Hardware support: Why haven't we seen really significant battery life gains on mobile processors despite constant improvements in "efficiency" with every iteration?

    September 17, 2021

    Hardware support: Why haven't we seen really significant battery life gains on mobile processors despite constant improvements in "efficiency" with every iteration?

    Why haven't we seen really significant battery life gains on mobile processors despite constant improvements in "efficiency" with every iteration?

    Posted: 16 Sep 2021 08:31 PM PDT

    Apple. Qualcomm. Mediatek. Samsung.

    Every single year, these companies come out with better processors. Almost always they say "gains in performance by x%, gains in efficiency by x%."

    Now, I understand that from periods like 2008-2010, 2010-2012, 2012-15, 2015-17, there were some pretty notable gains in processors' overall quality. I wouldn't want to go back to a 2015 chip for example just in terms of speed. And sure, I think phones today last probably a couple hours more on average (although I think software has a good bit to do with that too).

    But like, I have a top end phone from 2017. I've used 2021 phones. For the sort of normal everyday tasks I use them for....the speed difference is negligible. Oh for sure, lots of other hardware improvements most of the time in the phone itself. But they still feel basically super fast for everyday tasks that most people use smartphones for.

    My question is...why have zero companies put effort into SOLELY focusing on "efficiency" and not performance, and actually making chips that allow phones to operate at, say, 2017 speed levels (which, as a user of a phone with a 2017 chip...is still crazy fast for almost everything I do), and make the battery life last like 2 days?

    Is the answer truly just that devices the size of phones with screens and the current battery tech we have makes it physically impossible to have smartphones that last for a 48 hour period with regular use, and that chip performance gains really don't matter as much as manufacturers imply?

    Or is there some other aspect to it? Are multi-day smartphone batteries impossible to achieve even if you design a chip that is as fast as 2017 top end chips with a focus on only improving efficiency otherwise?

    submitted by /u/isommers1
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    What will DDR5 bring to laptops?

    Posted: 16 Sep 2021 06:25 AM PDT

    Early next year we should get first mobile Alder Lake and Zen 3+ mobile devices with DDR5. The question is will it bring significant changes or cause any potential "bad practices" ?

    • With higher density we can see more 16/32GB configs vs 8/16GB
    • Chance for Ryzen Infinity Fabric to move away from JEDEC 3200CL22 RAM (existing desktop APUs support way higher MTs than chiplet desktop parts already)
    • Slight improvement for integrated graphics?
    • Potential problem: vendors may opt for LPDDR5 (especially early on) which would be soldered
      • LPDDR4X 4266 was used at a premium, mostly with Tiger Lake laptops using iGPU only

    Anything else? For performance likely only specific workloads will notice the new RAM.

    submitted by /u/riklaunim
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