The iPhone 5′s A6 processor can dynamically vary its clock speed for performance

By , Sep 27, 2012

The A6 chip which debuted on the iPhone 5 earlier this month can do some pretty clever tricks, stemming from a heavily customized ARMv7 design. Benchmark data suggests that the A6 can dynamically overclock itself to up to 1.3GHz and downclock to just 500MHz, depending on workload.

This is nothing new in chip design, of course (just ask Nvidia or Qualcomm). But given that Apple designs its chips in-house based on ARM and Imagination Technologies blueprints, it shows just how far along Cupertino is versus companies that use off-the-shelf chips which are not as power or performance-efficient as the A6…

The A6 was originally thought to be clocked at 1.02GHz, per first Geekbench benchmark.

Current Editorials was able to see the chip up-clocked to 1.1GHz as well as 1.3GHz.

9to5Mac was able to see the chip’s speed drop to as low as 550MHz.


Apple’s application processor designs, via TechInsights. Click for larger.

TLD Today has a nice video showing the A6 chip being Geekbench’d.

This is what the A6 chip looks under a microscope.


So-called floorplan of the A6 chip reveals two ARM processing cores and three GPU cores. Photo courtesy of Chipworks.

Apple rates the A6 chip as being twice as fast in CPU and GPU performance.

At any rate, it looks like Apple’s acquisitions of chip experts PA Semi, Intrinsity, Anobit and AuthenTec is paying off now as the iPhone 5′s customized A6 chip appears to dynamically upclock and downclock its speed depending on workload, helping optimize battery life.

One more thing: AppleInsider claims that Apple is actively courting Texas Instruments engineers to help advance iOS processors.

Apple has been actively courting experienced employees at TI to help design and support its internal A-series chips. Unlike TI, which had to account for significant overhead with its chip clients related to managing documentation and support for various OMAP chips and features, Apple is the only consumer of its internally designed A-series chips. That frees the company to focus on building only what it wants and needs, and it doesn’t have to communicate with third parties about the intricacies of how its silicon works.

This is interesting because the chip maker announced earlier this week plans to focus more on specialized industries amid strong competition in the mobile space, where Nvidia, Samsung and Apple produce the vast majority of silicon used in tablets and smartphones.

Even though Texas Instruments has been scoring design wins, particularly in tablets, Apple and Samsung aren’t buying any chips from Texas Instruments.

Thoughts?

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  • 2PointSlow

    It’s ‘TLD Today’ not TLTToday

    • http://www.idownloadblog.com/author/dujkan Christian Zibreg

      fixed

  • carolinamic

    not as powerful

  • @dongiuj

    Now all they need to do is put it in a decent phone worthy of using it.

    • http://www.facebook.com/antman217 Anthony Antunez

      And get ruined by an OS that can’t handle it correctly? No thanks.

      • http://www.facebook.com/sapagt Димитър Господинов

        is it better to do a chip that handles only one os, only one device? that is not progress…the only reason the chip is faster is becouse it is on iOS that can not do sh*t….you can not chalenge the chip with that “OS”

      • http://www.facebook.com/antman217 Anthony Antunez

        When the chip was designed by Apple themselves, yes. They made the chip to be used specifically with iOS and vice versa. Using this chip with any other OS or hardware will not utilize it to the potential it was made for and will give the user a most likely mediocre experience. The chip is being challenged… by Apple and iOS that’s how they keep improving the chip by making new ones each year. Why do you think we still aren’t using the A4 anymore?

  • thor_molecules

    “…which are not as power or performance-efficient as the A6.”

    ^Citation needed.

  • TRIQ6

    Am I missing something here? Android phones do this all the time…

    • KyleRay

      pssst…. these iFools would believe Apple invented the Wheel, if Apple claimed it did! ……but we shouldn’t give them any ideas. Because I’m sure if anything is left unpatented, they’ll be sure to claim they invented it! ;-P

  • http://twitter.com/e420kush e420Kush

    My iPhone 5 is pretty snappy. I am quite impressed with the performance of this phone. My battery is better, safari is blazing fast speakers sound better. Its thin ,its light, its beautiful. Too bad AT&T dont have LTE in my area but I still get up around 9 MB download on 4G. But the A6 chip has impressed me so far.

  • Dave_Lui

    Lets’ hope this dynamic variations should lean towards making jailbreak easy..