Is it fine to use a 2gb stick in one slot and 1gb in the other?

Discussion in 'Buying Tips and Advice' started by c0bracommander, Feb 28, 2010.

  1. c0bracommander macrumors member

    Nov 5, 2008
    Wanting to max out the ram on my sister's MBP, but she has the model that only supports RAM up to ~ 3.2gb or so.

    Is it OK to have one slot with a 1gb stick and put a newer 2gb stick in the other, or would I need to upgrade with matching 2gb sticks?
  2. c0bracommander thread starter macrumors member

    Nov 5, 2008
  3. DMC-12 macrumors 6502


    May 16, 2007
    Nashville, TN
    Yes. Adding as much RAM as the machine will accept will give much better performance and is worth the minor performance hit that mismatched memory can cause in some machines.
  4. 92jlee macrumors 6502

    Sep 11, 2009
    Cardiff, Wales, UK
    Just get two 2gb sticks.. only 3.2 will be readable but you will get the added benefits of dual channel.
  5. admwright macrumors regular

    Sep 11, 2008
    This is the path I took for our iMac, works great.

    All the best
    Andrew W.

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