Mobile Device vs Laptop Performance Gap

Discussion in 'iPad' started by BaldiMac, Jan 17, 2012.

  1. BaldiMac macrumors 604

    BaldiMac

    Joined:
    Jan 24, 2008
    #1
    Has anyone seen any graphs or tables comparing the performance trends of mobile devices such as the iPad to traditional laptops? Is the gap shrinking? How fast?
     
  2. jeremyshaw macrumors 6502

    Joined:
    Oct 29, 2011
    #2
    It's not shrinking at all. Laptop have around, commonly 100W limit. Though can go to 300W in larger ones. Tablets? Maybe 4-5W. And until newer architectures focus on hitting a very low peak power, then it's going to stay that way.
     
  3. BaldiMac thread starter macrumors 604

    BaldiMac

    Joined:
    Jan 24, 2008
    #3
    How does that relate to overall performance? I kinda expected an answer in flops or some general benchmarks. Power consumption appears to be tangential to the topic.

    For example, it seems obvious to me that browsing performance on mobile devices have become much closer to laptops in the last year. Of course, that is just one aspect of the overall performance of the device.
     
  4. Stealthipad macrumors 68040

    Stealthipad

    Joined:
    Apr 30, 2010
    #4
    Performance?

    Performance in what terms. In what way are you wanting to compare these two items for performance?
     
  5. jeremyshaw macrumors 6502

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    Oct 29, 2011
    #5
    That has more to do with browser SW becomming more efficient, GPU rendering and threading, in particular. Otherwise, you are looking at some rather comparible architectures. If you WERE to compare them.... in terms of compute, the iPad 2 SoC gets around ~15 GFLOPS in theory? The lowest end IGP currently in a modern computer, the HD6250, gets about 44GFLOPS. For another, unrealistic reference, the HD6990m (the mobile version of the HD6870 desktop card), gets 1.6 TFLOPS, or 1,600 GFLOPS. The Fastest desktop single GPU? the HD7970 gets a wonton 3.7 TFLOPS.

    However, that is not directly comparible, as the HD6250 has more memory bandwidth (though the SGX is TBR to help negate that sizeable advantage...), MUCH improved texture filtering systems, and much better geometry performance then the raw compute power difference would suggest.

    In terms of percieved performance? Probably close. In terms of actual performance? That was the lowest end IGP, and it soundly trounces the A5 GPU in all but power consumption (even so, the HD6250 has a more power efficient vesion that is on a faster chip, too!)
     
  6. BaldiMac thread starter macrumors 604

    BaldiMac

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    Jan 24, 2008
    #6
    Nothing specific. Just wondering if some information is out there. Either some general benchmarks or processor performance (gigaflops). Something to define the overall performance gap between mobile device and laptops and how it has changed over time.
     
  7. BaldiMac thread starter macrumors 604

    BaldiMac

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    Jan 24, 2008
    #7
    Thanks for the information. Of course, a laptop trounces an iPad at this point in raw performance! I'm wondering how the gap is changing over time.
     
  8. jeremyshaw macrumors 6502

    Joined:
    Oct 29, 2011
    #8
    Well, effectively, both sides are pushing the limit of manuf process (around the same pace, too). Now, it's almost sheer architecture that is making the difference. In terms of smartphones, tablets? Yes, they have caught up greatly in the past 5 years. However, both lineups have, effectively, hit a limit as to how fast they each can be (power consumption and the directly related heat output), per process node (currently 28nm and 32nm; though still transitioning from 40/45nm). Until an architecture is designed, that is not scaleable, yet extremely powerful to the point of negating all other products, this divide will always exist around the level it does, now.
     
  9. Menel macrumors 603

    Menel

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    Aug 4, 2011
    Location:
    ATL
  10. BaldiMac thread starter macrumors 604

    BaldiMac

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    Jan 24, 2008
    #10

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