Difference between an i5 and i7

Discussion in 'iMac' started by ventuss, Dec 6, 2012.

  1. macrumors 6502

    Joined:
    Oct 9, 2011
    #1
    What is the difference btw i5 and i7 other than clock speed?
     
  2. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #2
    The i7 can hyper-thread, meaning you have four physical cores and two virtual cores per core, thus eight virtual cores, giving your more processing power for applications that can take advantage of that, like HandBrake or other transcoding or calculating software.
    The i5 only has four cores and one virtual core per physical core.


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  3. macrumors regular

    TrboMac

    Joined:
    Aug 8, 2012
    Location:
    NC/USA
    #3
    If you type that question into MRoogle you'll get all kind of info: http://mroogle.chaseh.net/

    It's a search engine a member made that links to the forum.


    **I was late, you got an answer...lol
     
  4. macrumors member

    EPiCDiNGO

    Joined:
    Sep 10, 2012
    #4
    Answer = 2 :D
     
  5. thread starter macrumors 6502

    Joined:
    Oct 9, 2011
    #5
    I work with 3d graphics and game engines: UDK, Unity, Maya, Zbrush, Photoshop, and Final Cut X. I ll be gaming too. The iMac is going to be my entertaining center.

    I decided to go for 3TB Fusion Drive and 680MX. I don't know if I should go for i7 and 16GB Ram as well.

    Do you know any benchmark comparing both i5 and i7 iMacs?
     
  6. macrumors member

    Joined:
    Dec 5, 2012
    #6
    i5 and i7 are the EXACT same (of most models, not counting Sandy-Bridge E) except for two things. 1) Hypethreading (HT): This allows two threads to run on the same core, giving you 4 "physical" cores and 4 "virtual" ones, which the computer treats as a total of 8 cores. Now, don't confuse this as having 8 core perf. as a thread is not a core, essentially you'll see that clock-for-clock and cache-to-cache, in heavily threaded apps (most ppl don't use these) a 25-40% increase in performance. 2) Cache, not a as big a deal(still important!), but i7's tend to have more. Granted though, most of the intel processors in iMacs, (not counting BTO) are S versions or low end versions.

    tl;dr unless you do heave processing you won't notice a diff.
     
  7. macrumors 6502a

    Joined:
    Dec 17, 2009
    #7
    The i7 costs $200 more.
     
  8. macrumors 6502a

    Razorhog

    Joined:
    Sep 16, 2006
    Location:
    Arkansas
    #8
    Keep in mind you can't use bootcamp with the 3tb drive.
     
  9. macrumors member

    Joined:
    Oct 26, 2012
    #9
    i7 vs i5
    in iMac 27''
     
  10. thread starter macrumors 6502

    Joined:
    Oct 9, 2011
    #10
    Why not?
     
  11. macrumors 6502a

    Razorhog

    Joined:
    Sep 16, 2006
    Location:
    Arkansas
    #11
    To support Windows, Apple hardware uses a CSM-BIOS. The Windows installer, when booted in BIOS mode, only supports the MBR partition scheme, which is limited to 2.2TB disks. Not partitions, disks.



    It would seem eventually Apple will need to update their EFI firmware so Windows can EFI boot instead, in which case Windows will then support GPT. And a huge number of hybrid MBR problems go away as well as the 2.2TB limit.

    https://discussions.apple.com/thread/3827724?start=0&tstart=0


    http://www.pcworld.com/article/235088/everything_you_need_to_know_about_3tb_hard _drives.html
    http://support.apple.com/kb/HT5446
     
  12. thread starter macrumors 6502

    Joined:
    Oct 9, 2011
    #12
    Will fans run noisier in i7 iMac?
     
  13. macrumors demi-god

    johnnyturbouk

    Joined:
    Feb 9, 2011
    Location:
    southerner trapped 'up north' (UK)
    #13
    typical, apple put the the i5, as the best value, in such a highly priced AIO
    for the price they ask for, they should of given us i7-3960X @ 3.30GHz included in the cost!

    :mad:
     
  14. macrumors 601

    Joined:
    Oct 14, 2008
    #14
    Well, try to find a better offer on the AIO market.

    BTW, that CPU alone is worth 50% of the iMac... You have some very weird ideas about how much things should cost.
     
  15. macrumors 68030

    Yebubbleman

    Joined:
    May 20, 2010
    Location:
    Los Angeles, CA
    #15
    As others have said, hyper-threading (one virtual core per physical core, which will speed up select CPU-intensive tasks) and additional cache (2MB).

    If you have the extra money to blow and you use your computer for all sorts of random things, I say go for the i7. If you only use your computer for the basics and you don't expect to use it for more than that, go with the i5.
     
  16. macrumors member

    Joined:
    Sep 12, 2008
    #16
  17. thread starter macrumors 6502

    Joined:
    Oct 9, 2011
    #17
    Does i7 iMac runs hotter and noisier than i5 iMac?
     
  18. macrumors 68000

    Confuzzzed

    Joined:
    Aug 7, 2011
    Location:
    Liverpool, UK
    #18
    I ordered my 27" with i7 but having serious buyer's remorse as I don't think I need it really, despite doing light video editing, photo editing, light gaming and running multiple applications across 2 screens, some of which are large databases.
     
  19. macrumors 6502a

    comatory

    Joined:
    Apr 10, 2012
    #19
    If you ask what is the difference you most probably don't need i7.

    Unless you wanna brag about high geekbench scores and such.
     
  20. macrumors 6502

    Joined:
    Nov 12, 2012
    #20
    nope, one family i5s and i7s have the same TDP (77W for both in the highest-end 27 iMac and 65W for all other models), so there would be no to very minor difference in noise and temperature (1-2% max).
     
  21. macrumors 6502a

    Joined:
    Dec 17, 2009
    #21
    $3,000 computer... $200 upgrade. Who cares?
     
  22. thread starter macrumors 6502

    Joined:
    Oct 9, 2011
    #22
    I am sure I don't need it right now, but I plan on using it for the next 4 or 5 years, and I don't know if I may regret the decision in a couple of months or years.
     
  23. macrumors 68000

    Confuzzzed

    Joined:
    Aug 7, 2011
    Location:
    Liverpool, UK
    #23
    I'd still rather pay for the GPU upgrade to 680MX instead as it will help drive my second screen more effectively
     
  24. macrumors member

    Joined:
    Feb 8, 2012
    #24
    As an Apple stockholder, I love this sort of thinking.
     
  25. macrumors 6502a

    Joined:
    Mar 1, 2011
    Location:
    Italy
    #25
    That's right. An honestly priced upgrade wouldn't fit with an overpriced computer.
     

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