iMac DDR2 upgrade to DDR3 RAM

Discussion in 'iMac' started by Stilface, Sep 28, 2011.

  1. Stilface macrumors member

    Joined:
    Jan 24, 2009
    #1
    My late 2008 iMac is currently sporting 4gb of DDR2 SDRAM, am i able to install DDR3?
     
  2. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
  3. Stilface thread starter macrumors member

    Joined:
    Jan 24, 2009
    #3
    Damn, well thanks for the reply. I take it my iMac has 2 RAM slots, am i able to upgrade to 2x 4gb DDR2, rather than 2x 2gb DDR2?
     
  4. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #4
    A 2008 iMac can take up to 6GB RAM unofficially, so just get one 4GB DDR2 SO-DIMM module instead of two.
    http://www.everymac.com/systems/apple/imac/index-imac.html
     
  5. Stilface thread starter macrumors member

    Joined:
    Jan 24, 2009
    #5
    Ok, thanks. It's been a while since I've upgraded anything. Is there a faster ram i could get than DDR2 PC2-6400 RAM (800mhz) which i currently have installed, that would be compatible?
     
  6. rkaufmann87 macrumors 68000

    rkaufmann87

    Joined:
    Dec 17, 2009
    Location:
    Folsom, CA
    #6
    Again no, I'd recommend visiting www.macsales.com (OWC) it will show all the RAM configurations that will work in your machine. If you don't want to buy from them that's fine but the site will show what works.
     
  7. alust2013 macrumors 601

    alust2013

    Joined:
    Feb 6, 2010
    Location:
    On the fence
    #7
    No, 800MHz is the fastest DDR2 speed made, however, the difference between RAM speeds is unnoticeable in general.
     
  8. anotherimacuser macrumors newbie

    Joined:
    Jan 11, 2014
    #8
    has anybody tried to use 2 4GB DDR2 SO-DIMM modules? What happens with such a configuration? Is the iMac using only 6 GB, or does the machine not starting?
     
  9. Twimfy macrumors 6502a

    Twimfy

    Joined:
    Sep 11, 2011
    Location:
    UK
    #9
    It won't start AND the 4GB module can only go in one of the slots. Can't remember if it's the left or the right off the top of my head. Not sure why this is either.
     

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