Does more memory trump matching memory?

Discussion in 'Buying Tips and Advice' started by devburke, Sep 10, 2009.

  1. devburke Guest

    Joined:
    Oct 16, 2008
    #1
    Let's say I wanted to upgrade the memory on an old iMac G5. I know that matching memory modules provide the best performance, but if a mismatched pair would provide more memory, would the advantage of having more memory overcome the advantage to having matched memory?

    tl;dr Which is better, having 2x512 memory that matches, or having 512+1gb memory that doesn't match but provides more memory?
     
  2. Cboss macrumors 6502

    Joined:
    Dec 11, 2008
    Location:
    Colorado
    #2
    A few months ago I was in the same spot you are. I went ahead and added a 1 GB stick because I figured the extra 512 MB would help a lot more than the slight bonus from matched pairs.
     
  3. Genghis Khan macrumors 65816

    Genghis Khan

    Joined:
    Jun 3, 2007
    Location:
    Melbourne, Australia
    #3
    you'll need more memory

    1GB is barely enough these days
     
  4. macgeek18 macrumors 68000

    macgeek18

    Joined:
    Sep 8, 2009
    Location:
    Northern California
    #4
    Um,I've never mismatched ram,so I wouldn't know,though I've heard never to do it.but that's with my job building pc's.But on a mac?it might handle it,it might not,I don't know.
     
  5. devburke thread starter Guest

    Joined:
    Oct 16, 2008
    #5
    This isn’t for me, it’s for my dad’s friend who’s just upgrading her G5 to Leopard. She really doesn’t have heavy needs, so 1.5 GB should be plenty.
     
  6. After G macrumors 68000

    After G

    Joined:
    Aug 27, 2003
    Location:
    California
    #6
    More memory (major speedup) is usually better than matching sticks for dual-channel (minor speedup).
     
  7. electroshock macrumors 6502a

    electroshock

    Joined:
    Sep 7, 2009
    #7
    More memory trumps matching memory just about every single time, especially if you wouldn't have enough memory otherwise.

    Unmatched memory may run a bit slower though you'd probably not notice it. But if you don't have enough memory and end up swapping to/from disk, that's thousands of times slower! Not even close.
     

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