Intel i7 quad core 2.5Ghz or 2.8 Ghz for Architecture

Discussion in 'MacBook Pro' started by dyao, Aug 22, 2014.

  1. dyao macrumors newbie

    Joined:
    Aug 22, 2014
    #1
    Hello All,

    I am an Architecture student who is seeking a new laptop,
    I am looking at the new mid 2014 15" MacBook Pro.
    I have narrowed down the selection between the Intel quad core i7 2.5 Ghz or 2.8Ghz.
    I am wondering if the 2.5 Ghz will do the job just fine, I have to do some presentation quality renderings as well as Rhino 3D modeling and ArchiCAD; should I upgrade to the 2.8 Ghz CPU?
    Is there going to be a big difference in terms of rendering time?

    Most of the guys at Apple Store were saying there's not much difference between the 2.5Ghz and 2.8 Ghz.

    Thank You Very Much
     
  2. maflynn Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #2
    I don't think the performance increase with the 2.8GHz will be noticeable in real world applications. I recommend the 2.5 and save yourself some money.
     
  3. austinpike macrumors 6502

    Joined:
    Oct 5, 2008
    Location:
    MN
    #3
    Theoretically there should be ~10% difference. Rendering will certainly peg all the cores. No, you won't notice the difference on a daily basis, but you might save 5 min on an hour rendering. Conversely, you could save a few bucks, take maybe a 10% speed cut and get a 2013 refurb model. You wouldn't really notice the difference between that and the 2.5 on a daily basis either.

    Personally once you are spending nearly $2500 the extra $200 bump seems pretty reasonable to me to have the absolute fastest.
     
  4. The Mercurian macrumors 65816

    Joined:
    Mar 17, 2012
    #4
    I just got the 2.8GhZ and love it - truly a beast of a machine. So fast. I'm getting stuff done soooooo much quicker than my late 2011 machine.
    Another consideration - hard disk size. The larger drives are faster.

    I guess it comes down to this - what is more important to you in the long run ? Small % time saved over next few years or several hundred dollars expense now?
     
  5. Cibike macrumors member

    Cibike

    Joined:
    Nov 10, 2013
    Location:
    EU
    #5
    I recommend to go for "base" 2,5GHz with optional 1TB SSD - difference between 2,5GHz and 2,8GHz is up to 10%, mostly not even 10% ..so even when you are going to render all day long, the real world difference will be in minutes, but much faster and bigger SSD that's money well spent :)
     
  6. CmdrLaForge macrumors 68040

    CmdrLaForge

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    Feb 26, 2003
    Location:
    around the world
    #6
    You will definitely not need the faster machine. If you still should buy it depends on many things like how much money you have, how many years you want to keep the machine and so on.
     
  7. merrickdrfc macrumors 6502

    merrickdrfc

    Joined:
    Jan 8, 2011
    Location:
    Berlin
    #7
    Save your money, 2.5 GHz is more than enough in the real world and if you really need it put the money toward the 1TB SSD
     
  8. dyao thread starter macrumors newbie

    Joined:
    Aug 22, 2014
    #8
    Thank you for all the helpful advices.
    If it is up to 10% difference, does that mean if I have a two hour rendering it would only be 12 minutes faster the most with a 2.8 ghz? (Theoretically)

    Seems like you guys are more leaning towards save up the $180 on CPU and upgrade the hard drive to 1TB if I want to spend the extra money on the laptop.

    Thank you very much again.
     
  9. JHUFrank macrumors 6502a

    JHUFrank

    Joined:
    Apr 16, 2010
    #9
    Get the 2.5 and spend the saved money on extra storage or toys for your new rMBP
     
  10. thunng8 macrumors 6502a

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    Feb 8, 2006
    #10
    According to geekbench .. The difference is less than 4% for 64bit CPU mufti core. Definitely not worth it.

    http://browser.primatelabs.com/mac-benchmarks

    Bare feats has the 2.8ghz model being slower in some tests than the outgoing 2.6ghz model because of throttling.
     
  11. Zwhaler macrumors 603

    Zwhaler

    Joined:
    Jun 10, 2006
    #11
    I think it's worth it just so your machine will last longer in the future. I got the 2.66GHz i7 over the 2.53 i5 back in 2010 and it makes a big difference these days with Final Cut Pro X. If I hadn't got that i7 with hyper-threading and had the 2-core i5 instead, I probably would have felt upgrading was necessary at this point, but instead I can continue using the machine for awhile longer.
     
  12. Eithanius macrumors 65816

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    Nov 19, 2005
    #12
    i7 vs i5 was a big difference back then compared to the current i7 vs i7...
     
  13. thunng8 macrumors 6502a

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    Feb 8, 2006
    #13
    The i5 has hyper threading. Difference between the i5 2.53ghz and i7 2.66ghz is less than 10%
     
  14. Zwhaler macrumors 603

    Zwhaler

    Joined:
    Jun 10, 2006
    #14
    Indeed it does, it didn't use to in my gen MBP... I'm just saying down the line buyers tend to appreciate every bit of upgrade they can get when it gets older.
     
  15. maflynn Moderator

    maflynn

    Staff Member

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    Boston
    #15
    The cost vs what you really see in performance gain is such that its better to put the money elsewhere.
     
  16. thunng8 macrumors 6502a

    Joined:
    Feb 8, 2006
    #16
    not sure what you mean. I5 in laptops have always had hyper threading no matter what gen. First i5 in apple laptops were in 2010 and it had hyper threading.
     

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