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posted by martyb on Tuesday May 30 2017, @05:28AM   Printer-friendly
from the More-Moore? dept.

ARM has announced two new CPU cores, the Cortex-A75 and Cortex-A55. According to ARM, the A75 increases performance by around 22% over the A73 at the same level of power consumption. It can also scale to use more power per core (1-2 W rather than 0.75 W) which could slightly improve the performance of ARM laptops and tablets.

The smaller core, the Cortex-A55, increases performance by around 18% compared to the Cortex-A53, but also increases power consumption by 3%. Thus, power efficiency is about 14-15% better than the A53.

ARM's successor to big.LITTLE, DynamIQ, allows for up to 8 cores of any size (which for now means either the A75 or A55) inside of a single cluster. This means that a configuration including 1x Cortex-A75 and 7x Cortex-A55 cores would be possible, or even optimal according to ARM.

ARM also announced its Mali-G72 GPU, an incremental upgrade to the Mali-G71:

ARM says that the Mali-G72 will see a 25 percent boost to energy efficiency compared with the G71, meaning that SoC designers will have more power to play with to boost performance or increase battery life.

Similarly, the G72 offers 20 percent better performance density, meaning that manufacturers can pack more GPU cores into the same die area as before, giving further potential for a performance boost without an increase in cost. Previously ARM was targeting 16 to 20 Mali-G71 cores as the optimum for mobile, and expects to see the number push closer to the 32 shader core maximum supported by the G72 this time around.


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  • (Score: 1, Interesting) by Anonymous Coward on Tuesday May 30 2017, @06:17AM (8 children)

    by Anonymous Coward on Tuesday May 30 2017, @06:17AM (#517494)

    Are these designs tied to a particular fab tech? How can they link to specific power usage numbers otherwise?

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  • (Score: 2) by c0lo on Tuesday May 30 2017, @06:40AM (5 children)

    by c0lo (156) Subscriber Badge on Tuesday May 30 2017, @06:40AM (#517498) Journal

    How can they link to specific power usage numbers otherwise?

    You've heard of engineering?
    You know, since hundred years back, the guys have been able to predict the durability of a bridge without building it, especially when they are able to use CAD/simulation software.
    Granted, sometimes they predicted wrong, especially on high winds [wikipedia.org]; but most of the time they managed to come quite close.

    Quite crazy these guys, I have to tell yeah... the good ones can't be swayed by markedroids and MBA-s (and may need to be fired). Here's even an example of predicted failure [wikipedia.org].

    --
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    • (Score: 0) by Anonymous Coward on Tuesday May 30 2017, @06:53AM (2 children)

      by Anonymous Coward on Tuesday May 30 2017, @06:53AM (#517505)

      Anyone else who's a not drunk idiot?

      • (Score: 0) by Anonymous Coward on Tuesday May 30 2017, @06:58AM

        by Anonymous Coward on Tuesday May 30 2017, @06:58AM (#517506)

        I is sober as a fox and I only have one question, are these ARM all pimped out with them NEON lights?

      • (Score: 1) by AssCork on Tuesday May 30 2017, @01:22PM

        by AssCork (6255) on Tuesday May 30 2017, @01:22PM (#517609) Journal

        He's not drunk! (He's just speaking in cursive)

        --
        Just popped-out of a tight spot. Came out mostly clean, too.
    • (Score: 0) by Anonymous Coward on Tuesday May 30 2017, @08:55AM (1 child)

      by Anonymous Coward on Tuesday May 30 2017, @08:55AM (#517545)
      • (Score: 2) by c0lo on Tuesday May 30 2017, @09:06PM

        by c0lo (156) Subscriber Badge on Tuesday May 30 2017, @09:06PM (#517884) Journal

        Tacoma bridge is busted. Clearly it was a engineering/design defect.

        --
        https://www.youtube.com/watch?v=aoFiw2jMy-0 https://soylentnews.org/~MichaelDavidCrawford
  • (Score: 2) by takyon on Tuesday May 30 2017, @08:55AM

    by takyon (881) <reversethis-{gro ... s} {ta} {noykat}> on Tuesday May 30 2017, @08:55AM (#517546) Journal

    The power usage numbers are definitely subject to change. They are from ARM after all.

    Some cores are made identical to ARM's designs, others are customized:

    https://en.wikipedia.org/wiki/Comparison_of_ARMv8-A_cores [wikipedia.org]

    For example, Qualcomm Snapdragon 835 uses customized Cortex-A73 cores. Fab = Samsung’s 10nm "10LPE" FinFET process. The latest Exynos SoCs from Samsung use a combination of custom cores and what looks like normal Cortex-A53 cores.

    Here's a fun one: Apple’s A9 SoC Is Dual Sourced From Samsung & TSMC [anandtech.com]. Meaning you could order your iPhone 6s and get a chip with slightly different performance and efficiency. Luck of the draw.

    There's also GlobalFoundries, and Intel may even make ARM chips for third parties [arstechnica.com] in the future.

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  • (Score: 2) by TheRaven on Tuesday May 30 2017, @09:36AM

    by TheRaven (270) on Tuesday May 30 2017, @09:36AM (#517560) Journal
    Not sure why this is off-topic. The ARM data sheets always list the process that they've used for specific power numbers. These numbers are, according to TFA, from the same process that they quote power numbers for for the A53, though I can't find that in 10 seconds of looking.
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