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Update: Intel Expands Our Battery Testing At CES 2013
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Google

We opened the Google homepage on all four tablets and then let them drop to an idle state before we began logging battery power data.

The Acer W510, Samsung ATIV Tab, and Dell XPS 10 all consume roughly the same 2.8 W for most of the test. After a while, the two Qualcomm-powered tablets drop to an even lower ~2.5 W, outshining Intel’s Atom. We can't really say that we're surprised by this since Alan came to the conclusion that the ARM-based processor cores are very power efficient when they’re not doing anything. So, the fact that Qualcomm’s Krait-based design excels at idle is pretty much what we expected to see.

More interesting, perhaps, is that Nvidia’s Tegra 3 seems to oscillate in the 3 to 3.2 W range, and regularly spikes above 5 W.

Remember that this isn’t about us (or Intel) running power numbers to show how much better Atom is than its ARM-based competition. Intel admitted to this knowing that it doesn’t necessarily have the winning combination in all tests, and we clearly see Qualcomm with a measureable advantage in the last part of this chart.

Wikipedia

On Wikipedia, the Krait-based SoC appears to be roughly tied with the Atom Z2760 much of the time. During the page render itself, Dell’s specific implementation appears to lead the pack slightly, while the ATIV Tab and W510 appear swap places depending on the spike you’re looking at. Unmistakable, though, is Microsoft's Tegra-based Surface consistently using more power than the other three tablets.

If you sustain the numbers in this chart for any given measure of time, the Surface depletes more of its battery than the competition, necessitating a larger power source to achieve the same overall run time.

Tom's Hardware

Idling on the Tom’s Hardware homepage is slightly more power-intensive than on Wikipedia, as we see both the Qualcomm- and Intel-based tablets hovering just over 3 W. Meanwhile, Tegra 3 is in the 4 W range.

All four tablets appear to dip lower and spike higher than the previously-tested pages, reflecting the more content-heavy nature of Tom’s compared to Google and Wikipedia. Here, though, Krait’s advantage wanes as the heavier load pushes it ever so slightly beyond the Atom’s power usage. However, this difference is minor in comparison to the Tegra 3-based Surface, which appears to use about 1 W more over the entire course of our log.

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  • 1 Hide
    amuffin , January 10, 2013 6:00 AM
    Strike a pose for the camera!
  • 1 Hide
    archange , January 10, 2013 7:17 AM
    Are there any news about the 5th companion core in Tegra being supported under RT? Is software patching feasible?
  • -4 Hide
    abbadon_34 , January 10, 2013 7:45 AM
    Please tell me the "Metro" reference in IE10 does not mean some forced Win8/Metro style interface. They've lost enough users to other browsers, do they want the rest to jump ship?
  • 3 Hide
    tomfreak , January 10, 2013 8:46 AM
    whatever it is, 5-10hours of battery life is not good enough. 24hours is the ideal length.
  • 7 Hide
    archange , January 10, 2013 8:47 AM
    abbadon_34Please tell me the "Metro" reference in IE10 does not mean some forced Win8/Metro style interface. They've lost enough users to other browsers, do they want the rest to jump ship?


    It's not "forced". On w8 you get applications specifically designed for touch input. Basically, you have two versions of IE10: the "regular" desktop one and the "Metro" version. The latter has re-placed the URL / search bar at the bottom and has larger, finger-friendly buttons. It also hides its bars for a full-screen browsing experience, which comes in handy on smaller tablet screens. Oh, and I don't use it. Dunno why, but it just doesn't appeal to me :p 
  • -7 Hide
    vaughn2k , January 10, 2013 10:39 AM
    AMD should never had sold the (Imageon) Adreno to Qualcomm.. they should have been gaining business in the mobile business by now... Ruiz was a @*!!@$$...
  • 2 Hide
    ojas , January 10, 2013 12:04 PM
    Also an interesting read:
    Anand's pre-CES article b/w Atom, Krait and the Cortex A15:
    http://www.anandtech.com/show/6536/arm-vs-x86-the-real-showdown
  • 1 Hide
    ojas , January 10, 2013 12:20 PM
    Was interested to read about the predictions for this year.

    Quote:
    In order to get the 5-10 hours of gameplay, Tegra 4 would need to run between 3.8 and 7.6 W. We're immensely curious to see if the company can do this.

    Anand estimated a 8w TDP for a quad core A15, i think it was the Exynos....with that in mind...i think you're indeed right about your estimate...

    The yellow line is the time he's gaming.

    Quote:
    Intel claims that its Haswell architecture will be exerting influence in the same space as quad-core Cortex-A15-based devices by the end of the year.

    True...Ivy Bridge's already dipped to 7w...
  • 1 Hide
    kyuuketsuki , January 11, 2013 5:06 AM
    So... you list those 3 SoCs as defining the 2013 tablet space and completely ignore:

    1) Samsung's A15-based Exynos
    2) AMD's Temash

    The heck?
  • 0 Hide
    cangelini , January 12, 2013 1:41 AM
    KyuuketsukiSo... you list those 3 SoCs as defining the 2013 tablet space and completely ignore:1) Samsung's A15-based Exynos2) AMD's TemashThe heck?

    We didn't have that hardware on-hand in Vegas, but certainly would like to add those numbers!
  • 1 Hide
    mayankleoboy1 , January 14, 2013 3:29 AM
    The only noteworthy point i see here is how much Tegra3 sucks.
    Makes me wonder what the hell was MS thinking when it chose T3 as the heart of their main product, and a showcase of WinRT. Has MS management gone completely crazy ?
  • 0 Hide
    mayankleoboy1 , January 14, 2013 3:31 AM
    Is there any way these tests can be repeated, but with Android as the OS ?
  • 0 Hide
    mayankleoboy1 , January 14, 2013 3:32 AM
    ojasvy Bridge's already dipped to 7w...


    That was marketing BS. FUD 101.
    Read the updated reports, which clearly say that those chips are 13W really.
  • 0 Hide
    mayankleoboy1 , January 14, 2013 3:37 AM
    @ Chris Angelini :

    Did they give all that power measuring equipment to you for keeps ? Or was it only for the CES ?
  • 0 Hide
    thety6on , January 16, 2013 4:11 PM
    Hahaha nice job with the picture, Tom's. I love Hemingway