Upgrade RAM: Two, 2GB memory cards or will one 4GB memory card work?

Discussion in 'MacBook Pro' started by cmhall9, Oct 24, 2013.

  1. cmhall9 macrumors newbie

    Joined:
    Sep 2, 2009
    Location:
    Summerville
    #1
    I want to upgrade from 2GB to 4GB. Do I need two 2GB memory cards or will one 4GB memory card work just fine with the other slot empty?

    I have a MacBook Pro 13-inch, Mid 2009
    Processor 2.26 GHz Intel Core 2 Duo
    Memory 2 GB 1067 MHz DDR3
     
  2. AlecMyrddyn macrumors 6502

    Joined:
    Dec 5, 2008
    Location:
    Southern Maine
    #2
  3. snaky69 macrumors 603

    Joined:
    Mar 14, 2008
    #3
    RAM works best in matched pairs as it allows it to run in dual channel.

    For best performance I'd recommend getting 2x2.
     
  4. cmhall9 thread starter macrumors newbie

    Joined:
    Sep 2, 2009
    Location:
    Summerville
    #4
    Yea that looks like it.
    I actually watched a YouTube video from OWN on how to change out the RAM earlier today.

    I'm asking about the second port because I'm window shopping on EggHead.com and the memory I'm looking to buy is a single 4GB card.

    ----------

    I agree.
     
  5. MacModMachine macrumors 68020

    MacModMachine

    Joined:
    Apr 3, 2009
    Location:
    Canada
    #5
    do not worry about pairs , performance advantage is very minimal.

    1 stick will do fine.
     
  6. Animalk macrumors 6502

    Joined:
    May 27, 2007
    Location:
    Montreal Canada
    #6
    I wonder if there is a gain in battery life by running just one ram stick instead of two when the total RAM available is equal in both cases.
     
  7. cmhall9 thread starter macrumors newbie

    Joined:
    Sep 2, 2009
    Location:
    Summerville
    #7
    I ended up get 2, 2GB chips for a total of 4GB.
     
  8. seanirish macrumors newbie

    Joined:
    Nov 3, 2014
    #8
    If it says the Mac's maximum RAM is 4gb, does that mean 4gb per stick or 4gb total? Could I run 8gb total on my Mac? I have a Mid-2007 Macbook.
     
  9. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #9
    The Mid 2007 MacBook (MacBook2,1) is limited to 2GB per slot, but will not use more than 3GB total. - So, you can install 2 x 2GB for a (slight) speed advantage with a matched pair, but only 3GB maximum will be recognized.
     
  10. seanirish macrumors newbie

    Joined:
    Nov 3, 2014
    #10
    I have 2x2 right now and it recognizes that it has 4GB of RAM in it.
     
  11. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #11
    Then, you don't have a mid-2007 MacBook, but you have a late-2007.
    The model identifier in your System Profiler will show that you have a MacBook3,1 - which also will work with up to 6GB RAM, and will, in fact, work with a single 4GB stick, if that's what you want to install.
     

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