Am I right in thinking my iMac has 1 fan?

Discussion in 'iMac' started by MartinAppleGuy, Mar 27, 2014.

  1. MartinAppleGuy macrumors 68020

    MartinAppleGuy

    Joined:
    Sep 27, 2013
    #1
    I have the Late 2013 iMac (21.5", 2.9-3.6Ghz i5, Nvidia GeForce GT 750m GDDR5 VRAM). My question is does it have just one fan? Or is it 2?
     
  2. firedept, Mar 27, 2014
    Last edited: Mar 27, 2014

    firedept macrumors 603

    firedept

    Joined:
    Jul 8, 2011
    Location:
    Somewhere!
    #3
    You are correct. This is from iFixit teardown of the 21.5 iMac.
     

    Attached Files:

  3. Fatboy71 macrumors 65816

    Fatboy71

    Joined:
    Dec 21, 2010
    Location:
    UK
    #4
    The late 2012 onwards iMac's have only one fan, as this is all that is needed due to better cooling due to a more efficient design for cooling.
     
  4. MorpheusXX macrumors newbie

    Joined:
    Mar 27, 2014
    #5
    Correct, I recently used iFixit to pull my iMac apart. I can confirm it only has one fan.
     
  5. WilliamG macrumors G3

    Joined:
    Mar 29, 2008
    Location:
    Seattle
    #6
    And let me be the first to say (and not for the first time!) the new-generation iMacs are still a work of genius:

    My iMac has an i7 3.4Ghz desktop GPU, with a large 27" screen, 32GB RAM, TWO drives in it, a relatively powerful Geforce GPU in it (especially when it came out in late 2012!), speakers, microphone, BT, wifi etc etc, and let's not forget the PSU. All cooled by just ONE nigh-silent fan.

    Apple, I still salute you for this one.
     
  6. Piggie macrumors G3

    Piggie

    Joined:
    Feb 23, 2010
    #7
    Really, I always thought Desktop iMacs had Laptop CPU's and laptop GPU's due to the spice restriction of apples design?

    Has this now changed?
     
  7. mojolicious macrumors 68000

    mojolicious

    Joined:
    Mar 18, 2014
    Location:
    Sarf London
    #8
    I'd wait more than eighteen months before offering up a salute. There's plenty of time yet for it to fry...
     
  8. MandiMac macrumors 6502

    Joined:
    Feb 25, 2012
    #9
    Explanation

    No, it was always this way. CPU is desktop-class, GPU mobile. Notice the "M" after the GPU names, and for more infos about CPUs in Macs look here: http://www.everymac.com/systems/apple/imac/index-imac.html
     
  9. Piggie macrumors G3

    Piggie

    Joined:
    Feb 23, 2010
    #10
    Yes, I know the GPU's are M as you say, like they fit in laptops

    (let's be honest the iMac IS just a giant laptop on a stand)

    But the CPU's were not proper desktop ones either. they were S variants
     
  10. quagmire macrumors 603

    quagmire

    Joined:
    Apr 19, 2004
    #11
    The 4770S is still a desktop CPU. It just has a lower TDP than the standard 4770.
     
  11. yjchua95 macrumors 604

    Joined:
    Apr 23, 2011
    Location:
    GVA, KUL, MEL (current), ZQN
    #12
    You sure?

    My 27" iMac uses a 3.5GHz i7-4771. It's a proper desktop processor all right :)

    Processors used in:
    21.5": i5-4570R (Iris Pro), i5-4570S or i7-4770S (GT750M)
    27": i5-4570 (GT755M), i5-4670 or i7-4771 (GTX775M/GTX780M)
     
  12. joe-h2o macrumors 6502a

    Joined:
    Jun 24, 2012
    #13
    The i5 in my Late 2012 is not an S version, but either way, the S versions used are still desktop CPUs, just with a lower TDP.

    The unibody iMac line has always used desktop CPUs - they're even socketed in some models.
     
  13. Piggie macrumors G3

    Piggie

    Joined:
    Feb 23, 2010
    #14
    Thanks for clarifying that.

    I did look and as you say the S versions have a lower power requirement, for only a very small 2% ish drop in performance as they are clocked a little slower also.
     
  14. yjchua95 macrumors 604

    Joined:
    Apr 23, 2011
    Location:
    GVA, KUL, MEL (current), ZQN
    #15
    Here's a comparison between the i7-4771 (3.5GHz in high end 27") and i7-4770S (3.1GHz in high end 21.5")

    http://browser.primatelabs.com/geekbench3/compare/501623?baseline=191168

    There's only a 4.07% difference between them.
     

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