Mix Ram Sizes -

Discussion in 'Mac Pro' started by willgreene99, Jul 20, 2013.

  1. willgreene99 macrumors regular

    willgreene99

    Joined:
    Dec 16, 2010
    Location:
    DFW
    #1
    Mix Ram Sizes -

    I recently purchased this set from OWC -
    -- 32GB (4x8GB) DDR3 ECC PC10600 1333MHz SDRAM ECC for Mac Pro
    --

    I want to find out if I can add this set from OWC -
    -- 64GB (4x16GB) DDR3 ECC PC10600 1333MHz SDRAM ECC for Mac Pro
    --

    This should yield 96GB, but - does it work or am I setting myself up for problems?
     
  2. macuser453787 macrumors 6502

    Joined:
    May 19, 2012
    Location:
    Galatians 3:13-14
    #2
    This disclaimer is from OWC's website (the RAM page for the Mac Pro 4,1 and 5,1):

    "*16GB Module Sets require that all installed modules be of the same p/n OWC 16GB modules. 16GB modules do not mix with other density (1GB, 2GB, 4GB or 8GB) module types."

    This is the link to the page that has that disclaimer.
     
  3. willgreene99 thread starter macrumors regular

    willgreene99

    Joined:
    Dec 16, 2010
    Location:
    DFW
  4. xcodeSyn, Jul 21, 2013
    Last edited: Jul 22, 2013

    xcodeSyn macrumors 6502a

    Joined:
    Nov 25, 2012
    #4
    No, you can't mix 16GB modules which are registered RAM with your 8GB modules which are unbuffered. As far as I know there are currently no unbuffered 16/32 GB modules available, so forget about mixing 16GB modules with lower density ones unless they are also registered.
     

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