Duo 13: i5-4200U vs i7-4500u vs. i7-4650u ?

Discussion in 'VAIO / Sony' started by DrCheap, Dec 2, 2013.

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  1. DrCheap

    DrCheap Pen Pal - Newbie

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    I am seriously close to pulling the trigger and buying a Duo 13 for the long battery life and light weight in a pen-enabled convertible, plus solid performance. I just cannot decide on the CPU. This is a big purchase and the machine will need to run me 3+ years for work, so I don't want to regret the decision. My first thought was just buy the biggest CPU possible, but it seems that has some drawbacks...

    I know the 4650u has vpro and the hd5000, which set it apart, but I have read a good deal of chatter about the hd5000 machines actually underperforming the hd4400 or hd4600 machines due to some issues with thermal overhead and base clock speeds (the 4650 base clock is lower than the 4500?).

    I've also seen a bunch of chatter about the relative power consumption of these, which appears to indicate about a 15-20% gain in battery life with the i5 vs. the i7.

    The problem is that almost all the benchmarks between these cpus is apples to oranges (or Apples to Acers, as the case may be). That is, I have not seen any detailed comparison of the same build or even brand between the different CPU options, so I really don't know how to gauge their meaningful differences in the field.

    So now I have a serious decision to make and I need some help. I am hoping folks could post some benchmarks for their individual configurations showing cpu, ram, and hd to see if we can get some evidence-based answers to the following questions:

    How much of a relative performance gain is there between these three CPUs in a device like the Sony Duo 13?

    How much of a relative gain or loss in battery life is there between these three CPUs?

    Additionally, does anyone know:

    Are there any specific or peculiar implementations between these for the Duo 13?

    Any other reasons to prefer one to the others?

    Thanks!
     
  2. excalibur1814

    excalibur1814 Scribbler - Standard Member Senior Member

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    All in all.. you can CHARGE the battery when it gets low but you probably won't be able to change the CPU if you'd like more speed.

    i5-4200U
    1.6GHz turbo 2.6GHz - Intel 4400 (200mhz, 1GHz)

    i7-4500U
    1.8GHz turbo 3GHz - Intel 4400 (200mhz, 1.1GHz)

    i7-4650U
    1.7GHz turbo 3.3GHz - Intel 5000 (200mhz, 1.1GHz)

    My gut thinks that the i7-4500U might be the one to go for but my head ALWAYS likes the max figures/power. You can always set everything to max battery when out on the road.


    i7-4650u :)
     
  3. DrCheap

    DrCheap Pen Pal - Newbie

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    Thanks, Excalibur, for the advice. Here is the data I have gathered so far:

    Generic CPU cumulative benchmarks:

    Passmark CPU Mark
    Intel Core i5-4200U @ 1.60GHz 3363
    Intel Core i7-4500U @ 1.80GHz 3971
    Intel Core i7-4650U @ 1.70GHz 4345

    Passmark G3D Mark
    Intel HD 4400 500
    Intel HD 5000 515

    Vaio Duo 13 Specific Benchmarks:

    Intel Core i5-4200U @ 1.60GHz w/ HD4400
    3dMark 11= 970 PCMark 7= 4500

    Intel Core i7-4500U @ 1.80GHz w/ HD4400
    3dMark 11= 999 PCMark 7= 4800

    Intel Core i7-4650U @ 1.70GHz w/ HD5000
    3dMark 11= 826 PCMark 7= 5080

    I really need more scores from Duo 13 owners who have the 4650U. That 3dMark11 score is pretty weak for the HD5000.

    Battery runtime tests are so variable from place to place I have a hard time comparing them outside a controlled environment, but I suspect that Anandtech review with the Airbooks will be the story all over (and also explains why runtime on any of these CPUs varies from review to review so much). (see http://www.anandtech.com/show/7113/2013-macbook-air-core-i5-4250u-vs-core-i7-4650u/4 )

    Overall, not much gain in that 4650U, it seems.
     
    Last edited: Dec 2, 2013
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  4. wataru

    wataru Scribbler - Standard Member

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    I choose i5 because it consumes less power = more battery life. For your information, here is the spec sheet for Lenovo Yoga, where it stated 6hrs for i5 and 5.3hrs for i7. Almost an hour difference.
     
    Last edited by a moderator: May 18, 2015
  5. DrCheap

    DrCheap Pen Pal - Newbie

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    Thanks for that link, Wataru. 11-12% battery life difference is certainly a significant concern, especially for only a gain of 3% in 3dMark and 7% in PCMark.
     
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