riMac 5K P3 - Keep old 32gb 1333 RAM?

Discussion in 'iMac' started by eoren1, Oct 18, 2015.

  1. eoren1 macrumors 6502

    Aug 17, 2007
    I'm planning to purchase the new riMac 27" once user reviews are in and I can make up my mind about the CPU and GPU choices (Likely setup will by i7/395/512GB SSD/trackpad for a photography workflow).

    I just checked my 2011 iMac and I have four 8gb 1333MHz DDR3 ram in it. I plan to sell the iMac locally for about $650 (going rate for my model on eBay). I just realized I could potentially swap out the memory from my 2011 iMac to the new one (and vice versa).

    1. Is there any real world difference in using 1867MHz vs 1333MHz RAM?
    2. Will the 2011 iMac work with two 4GB 1867MHz RAM sticks taken from the 2015?


  2. yuhong macrumors newbie

    May 4, 2008
    The older machine should be able to downclock the faster RAM if needed

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