Memory Upgrade for Mid-2011 27" iMac

Discussion in 'iMac' started by lugesm, May 30, 2013.

  1. lugesm macrumors 6502a


    Sep 7, 2007
    I have a mid-2011 27" iMac with 3.4Ghz Core i7 and 8GB memory as configured in the originally purchased machine.

    I want to upgrade to 16GB and have found a number of threads about OWC vs Crucial. That helps.

    My problem is: I already have 8GB originally installed by Apple at the time of purchase of the machine on 2 of the 4 memory slots. Will there be any compatibility problem with installing an additional 8GB from OWC in the additional 2 memory slots? Or, do I have to buy the full 16GB from OWC or Crucial and throw the Apple memory out?

    Thanks for your help.
  2. GoDuke1 macrumors member

    Jan 8, 2011
    North Carolina
    No issues at all. I had 4 gig originally, and upgraded to 12 gig from crucial. You can mix it up with no problems. I'm still running the Apple 4 gig with 8 more from crucial.

    Easiest and cheapest upgrade you can make. :D

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