NEW 5K iMac 27 - 1600 or 1867 Mhz RAM?

Discussion in 'iMac' started by AppleGuy1993, Oct 13, 2015.

  1. AppleGuy1993 macrumors newbie

    Joined:
    Oct 13, 2015
    #1
    The apple support page says that it's 1600 Mhz for the new 2015 model https://support.apple.com/en-us/HT201191

    The Tech Specs page says it's 1867.

    Not sure which 3rd party RAM to buy (planning on upgrading to 32GB)

    Any suggestions?
     
  2. Liffey macrumors regular

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    Feb 2, 2010
  3. Alesc macrumors 6502

    Alesc

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    Nov 11, 2014
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    France
    #3
  4. Liffey macrumors regular

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    Feb 2, 2010
    #4
    Hmm, Crucial says those aren't compatible with iMac.
     
  5. itfiend macrumors newbie

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    Oct 12, 2015
    #5
    May just not have updated site yet?
     
  6. gmanist1000 macrumors 68030

    gmanist1000

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    Sep 22, 2009
    #6
    They're probably referencing the old version which had 1600MHz speed.
     
  7. Alesc macrumors 6502

    Alesc

    Joined:
    Nov 11, 2014
    Location:
    France
    #7
    I have 4 of those running in my 2013 27" right now ;)
    The memory controller is in the Intel CPU, you can even put 2133MHz memory if you want.

    Crucial is advising that because in previous iMacs, if you mixed the original "Apple " RAM (1600MHz CL11) with faster RAM (CAS9 or CAS10), the controller run all the modules at 1333MHz CAS9 or 10 to adapt the speed to the slower modules...

    If you have time: http://forums.macrumors.com/threads/rimac-upgrading-ram.1812955/
     
  8. Liffey macrumors regular

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    Feb 2, 2010
    #8
    I think I'll wait until someone tests DDR4. Curious if that would work.
     
  9. MacVault macrumors 65816

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    Jun 10, 2002
    Location:
    Planet Earth
    #9
    Speaking of RAM, how much faster is DDR4 vs DDR3? In what situations would I really notice the difference? ie. video production? gaming? ??
     
  10. T'hain Esh Kelch macrumors 601

    T'hain Esh Kelch

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    Aug 5, 2001
    Location:
    Denmark
    #10
    Unless you run a rendering farm, not really.
     
  11. cynics macrumors G3

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    Jan 8, 2012
    #11
     
  12. mosher macrumors member

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    Jul 16, 2013
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    Germany/Ukraine

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