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Q: Late 2015 27 iMac 5k RAM spec

I am planning to get a new iMac 5k 27" with 4GHz.  I'd like to know the RAM specs and any recommended third party RAM that I could use with the system.

Most RAMs available online mention a freq of 1866 Mhz but Apple's spec seems to be 1867, i.e. off by 1. Would that matter?

 

Also, what are the other things I need to look at before getting a third party RAM for the new iMac.

iMac with Retina 5K display, OS X El Capitan (10.11)

Posted on Oct 13, 2015 12:30 PM

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Q: Late 2015 27 iMac 5k RAM spec

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  • by Slightlylost,

    Slightlylost Slightlylost Jun 14, 2016 3:36 PM in response to raripps
    Level 1 (4 points)
    Desktops
    Jun 14, 2016 3:36 PM in response to raripps

    raripps I have had the same problem with 64 GB of OWC memory in my late 2015 27 Imac. Were you able to get it to work?

  • by Philip P Thomas,

    Philip P Thomas Philip P Thomas Aug 2, 2016 9:23 AM in response to raripps
    Level 1 (59 points)
    Aug 2, 2016 9:23 AM in response to raripps

    What was the outcome with OWC and did you try an alternative brand? I installed 64GB (four sticks of 16GB) twice and experienced the crashes and logging out etc. So for the second time I'm returning the RAM and requesting a refund. I ran memory tests and they all failed.

    I've never had a issue with OWC ram so this is a new one for me. The reviews I've read on forums and B&H have stated the same issues and crashes I'm experiencing.

    I'm purchasing two 16GB of ram from Crucial and will update here. If that goes well I will purchase another set.

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