any battery life difference between i5 and i7 haswell

Discussion in 'MacBook Air' started by Acorn, Jun 11, 2013.

  1. Acorn macrumors 68020


    Jan 2, 2009
    if i upgrade from the haswell i5 to the i7 how much of an impact on battery life do you think it will take.
  2. B... macrumors 68000


    Mar 7, 2013
    There are a few threads about this on page one.
  3. jjfcpa macrumors member

    Feb 25, 2009
    Battery life is critical for me because I'm always on the move instead of tethered to an AC outlet. I went with the i7 because I've got a 2012 i7 right now and I get about 6 hours running VMWare and web, office.

    I'm willing to take the trade off in battery life for the performance advantage.
  4. TC25 macrumors 68020

    Mar 28, 2011
    Zero impact.
  5. entatlrg macrumors 68040


    Mar 2, 2009
    Waterloo & Georgian Bay, Canada
    Incorrect. i7 won't run as long as i5 on battery.
  6. cmathis macrumors newbie

    Feb 21, 2012
    Maybe not, but the difference would be negligible. Same TDP.
  7. curtoise macrumors 6502a

    Apr 19, 2010
    I've ordered the i7 and thinking on changing the order, I've seen tests of 2012 MBA with i5 and i7 and the i7 was much hotter, faster fan rpm speeds and less battery life than the i5, I wonder if the new Haswell processor is any different than the 2012 model.
  8. amitdoc2b macrumors 6502a

    Feb 25, 2008
    #8 only showed a 15-25 min battery life difference at most for the 2012 MBA i5 vs i7.
  9. curtoise macrumors 6502a

    Apr 19, 2010
    That's a lot in my book and more considering heat increase and fan noise and spinning times too, I'm wondering what are the test results for Haswell, hopefully they will be posted soon.
  10. n1tut macrumors regular


    Nov 20, 2010
    Glen of Newmill, Keith, Scotland
    Has it been announced whether the 9hr and 12hr battery life is with Mountain Lion or Maverick installed?

  11. TC25 macrumors 68020

    Mar 28, 2011
    I am not OCD. There's no difference.

  12. curtoise macrumors 6502a

    Apr 19, 2010
    15% more battery when you are doing business on the road is not bring OCD I think.
  13. Fed macrumors 6502

    Jul 7, 2012
    I fail to see how upgrading to the i7 would increase running hotness. Surely, if there was any, it'd be under load that surpasses the i5 performance threshold?
  14. curtoise macrumors 6502a

    Apr 19, 2010
    There is an extensive test with videos done on the 2012 models ( looking for the link to post ) where you can see the i7 running at 100 degrees against 86-90 degrees on the i5 running extensive tasks, I wonder if Haswell is any different.
  15. TC25 macrumors 68020

    Mar 28, 2011
    You are assuming your usage patterns match the testing that was done. A very bad assumption.
  16. curtoise macrumors 6502a

    Apr 19, 2010
    You are assuming that you know my usage patterns. A very bad assumption.

    The tests performed in the previous model match my usage patterns. There were not scientific tests in a lab, they were normal use tests.
  17. TC25 macrumors 68020

    Mar 28, 2011
    Good for you.
  18. curtoise macrumors 6502a

    Apr 19, 2010
  19. calvol macrumors 6502a

    Feb 3, 2011
    Get the i5 if you want a cooler machine, lower freq, lower heat. BTW, Haswell's are hotter than Ivy B.
  20. curtoise macrumors 6502a

    Apr 19, 2010
    Thanks, do you have any links to review and tests website with the new MBA?
  21. Roman2K~ macrumors 6502a

    Mar 11, 2011
    There's this excellent article by Michael Olivero that I liked very much, comparing the 2012 i5 vs. i7, focusing on battery life and heat output:
    So yes, there actually is a difference between the i5 and i7, at least on Ivy Bridge. The conclusion is simple: if you favor battery life (and/or cool operation) over performance, then i5, otherwise i7.
  22. warriorz, Jun 12, 2013
    Last edited: Jun 12, 2013

    warriorz macrumors regular

    Jun 25, 2010
    That won't happen for a while, not the whole comprehensive tests you want on heat, battery life anyway. (Anandtech does have a 13 inch model i5 at the moment but he states he's on the road so that one won't be tested for a bit). I'd say that is the test to look out for. He's always comprehensive on comparisons for battery life and associated issues such as heat generation, temperatures, fan initiation and running speeds and so on, all of which impact battery life. But who knows there might be a minimal difference, at least in comparison to last years models. But that's just speculation at the moment, lets wait for his results.
  23. curtoise macrumors 6502a

    Apr 19, 2010

    That is the exact test that I was watching too and yes you can see that there are difference on that processor, I wonder if the 2013 are the same.

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