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  1. #1
    Battery life of 2008 Penryn 2.4 vs. 2.5 MBPs
    riverteeth's Avatar
    Member Since
    Dec 13, 2007
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    Taipei
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    125
    Specs:
    Macbook Pro 15" (early 2008, pre-unibody), 2.4GHz Core 2 Duo, 4GB RAM.
    Battery life of 2008 Penryn 2.4 vs. 2.5 MBPs
    Hi all,

    I was wondering if anyone has seen battery drain tests pitting the new 15" MBPs against each other. On the apple site, they claim the two models should be equal here, 5 hours (which obviously has to be taken with a grain of salt). But CNETs tests appear to have the 2.5 model getting 4:23 while the 2.4 model only gets 3:35. Has anyone seen any other tests?

    The CNET test also have pretty wide margins in performance between these two models. I had pretty much been happily convinced by the review that the 2.4 was definitely a better value, and not much of a compromise in terms of performance. Now I'm not sure...

    I typically deal with large image files and catalogs (Photoshop CS3 and Lightroom), not much video, and no gaming. Thanks!
    "The past is not dead. In fact, it's not even past." -William Faulkner

  2. #2
    Battery life of 2008 Penryn 2.4 vs. 2.5 MBPs
    riverteeth's Avatar
    Member Since
    Dec 13, 2007
    Location
    Taipei
    Posts
    125
    Specs:
    Macbook Pro 15" (early 2008, pre-unibody), 2.4GHz Core 2 Duo, 4GB RAM.
    The more I think about this, the more I think it should depend more on the speed of the hard drive, the 5400 rpm vs. the 7200 rpm drive, the faster drive eating more of the battery life. A faster processor with more L2 cache and a slightly better graphics card with more video memory should in theory be slightly less efficient. Am I right?
    "The past is not dead. In fact, it's not even past." -William Faulkner

  3. #3
    Battery life of 2008 Penryn 2.4 vs. 2.5 MBPs
    kgeier82's Avatar
    Member Since
    Dec 01, 2006
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    1,495
    Specs:
    MBP 2.4/2GB/200HD/256 8600gt
    the hard drive really only affects battery life by about 5% if that.

    Ive been there, and done that. Its all dependent on the two drives also. my 7k200 actually used LESS power than the 120 that came with my second mac. Go figure....

    it all depends.
    2.4ghz Unibody | Hitachi 320GB 7200 | 256MB 9600gt

  4. #4
    Battery life of 2008 Penryn 2.4 vs. 2.5 MBPs

    Member Since
    Apr 03, 2008
    Posts
    3
    riverteeth,

    Those Cnet benchmarks are complete nonsense and NOT consistent with other benchmarks on these machines.

    By the way, the new 2.5 ghz (penryn) MacBook Pro is NOT being compared to the NEW 2.4 ghz penryn version in those CNET charts. It is being compared to previous benchmark results from the last generation 2.4 ghz merom chip macbook pros. (Look at the system specs listed below the chart.) Clearly, battery life would NOT be better for the 2.5 over the 2.4, it would be slightly worse.

    Either way, those benchmark results are way off, and the CNET folks are simply too stupid to recognize what should be obvious. This should NOT surprise anyone who follows their frequent mistakes.

    Check out the Macworld benchmarks for a far more accurate picture. Both the 2.5 and 2.4 perform quite well and offer a nice (but not spectacular) bump in speed over the previous generation.

    http://www.macworld.com/article/1323...pro_bench.html

  5. #5
    Battery life of 2008 Penryn 2.4 vs. 2.5 MBPs
    kgeier82's Avatar
    Member Since
    Dec 01, 2006
    Posts
    1,495
    Specs:
    MBP 2.4/2GB/200HD/256 8600gt
    rather impressed with my first drain on my 2.4 penny.

    5hrs @ 30% brightness, and nothing but surfing/rebooting.

    most enjoyable was the lack of "lap-heat" it was still very nice on the bottom during this first run, idled at about 45c the entire time.
    2.4ghz Unibody | Hitachi 320GB 7200 | 256MB 9600gt

  6. #6
    Battery life of 2008 Penryn 2.4 vs. 2.5 MBPs
    riverteeth's Avatar
    Member Since
    Dec 13, 2007
    Location
    Taipei
    Posts
    125
    Specs:
    Macbook Pro 15" (early 2008, pre-unibody), 2.4GHz Core 2 Duo, 4GB RAM.
    Nice kgeier82! 5 hrs would be great... So, 30% brightness is all you need for normal indoor use?
    "The past is not dead. In fact, it's not even past." -William Faulkner

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