Will my MBP RAM fit a 27" iMac???

Discussion in 'iMac' started by Bronze84, Sep 13, 2014.

  1. Bronze84 macrumors newbie

    Joined:
    Oct 7, 2012
    #1
    Hi guys

    Wanting to upgrade from my Oct 2012 MBP 13" to a 27" iMac.

    I have 16gb RAM in my MBP but will only be ordering the iMac with 8gb RAM. Is it possible to swap the RAM in them both so that the iMac has 16gb?

    Couple of screenshots if this helps at all....

    [​IMG]

    [​IMG]

    Thanks in advance
     
  2. cruisin macrumors 6502a

    cruisin

    Joined:
    Apr 1, 2014
    Location:
    Canada
    #2
    Both use laptop parts and the memory speeds are the same. You will be fine with reusing the memory.
     
  3. SaSaSushi macrumors 68040

    SaSaSushi

    Joined:
    Aug 8, 2007
    Location:
    Takamatsu, Japan
    #3
    I'm fairly sure Apple started using DDR3L (1.35V) RAM in the Late 2012 MacBook Pros but I would check to be sure.

    The Late 2013 iMacs are extremely finicky with RAM and, although Apple lists DDR3 on their memory specs, run much better with the lower voltage RAM particularly with 32GB.
     
  4. thedeske, Sep 13, 2014
    Last edited: Sep 13, 2014

    thedeske macrumors 6502a

    Joined:
    Feb 17, 2013
    #4
    Good catch DDR3 vs DDR3L - mid to late 2012 laptops - exception the Mid 2012 Retina is 3L
    The late 2013 imac is DDR3 - not 3L

    Possible it will work, but tread carefully & test first ;)

    In past years, same season MBPs and iMacs were an easy swap, but a slight dip in voltage can be tricky.
     
  5. SaSaSushi macrumors 68040

    SaSaSushi

    Joined:
    Aug 8, 2007
    Location:
    Takamatsu, Japan
    #5
    The Late 2013 Haswell iMacs run best with 1.35V RAM. Take it from someone who went on a very long and difficult journey through many brands and voltages before getting 32GB to run stably.

    See here and here for more info.

    As mentioned, Apple inexplicably lists DDR3 on it's memory upgrade page for the Late 2013 iMac while shipping them with DDR3L only.
     

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