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Thread: iMac RAM

  1. #1
    iMac RAM

    Member Since
    Jul 31, 2007
    Posts
    5
    iMac RAM
    Hi,
    I currently have an Intel iMac 17" core duo and recently upgraded it from 1gb to 2gb. My question is this, will it make a difference that I am only using one 2gb stick rather than two 1gb sticks.
    The only applications that I normally use are Office 08, Safari and Adobe CS3.

    Thanks

  2. #2
    iMac RAM
    harveydov's Avatar
    Member Since
    Apr 30, 2008
    Location
    UK
    Posts
    23
    Specs:
    MBP i7 2.0 15" Hi-Res 8gb RAM, 500GB / 32GB iPhone 4. Apple TV 2G++++
    some machines work slightly better in pairs but it can very from machine to machine. When you have two sticks the transfer on the ram bus is shared however bus speeds are at a higher speed these days to cope.

    The notice is negligible.
    Harv

  3. #3
    iMac RAM
    Soulwar's Avatar
    Member Since
    Jan 27, 2008
    Location
    Estero, FL
    Posts
    1,515
    Specs:
    iMac 17" 1Ghz G4  iPhone 3G  10.5.5
    It depends on which iMac you have.

    The iMac "Core Duo" 1.83 17-Inch and iMac "Core Duo" 2.0 20-Inch -- the "iMac (Early 2006)" models -- shipped with "at least 512 MB of DDR2 SDRAM installed into the top slot" and can be upgraded to "2 GB total (a 1 GB SO-DIMM in each of the two slots)". There is not a performance penalty for populating a single slot or populating both slots with different capacity modules.

    The iMac "Core Duo" 1.83 17-Inch (IG) and iMac "Core 2 Duo" 1.83 17-Inch (IG) -- the "iMac (Mid 2006)" and "iMac (17-Inch Late 2006 CD)", respectively -- shipped with "at least 512 MB of DDR2 SDRAM, in two 256 MB DIMMs; one in each of the memory slots" and also can be upgraded to "2 GB total (a 1 GB SO-DIMM in each of the two slots)". However, as these models use slower integrated graphics (IG) that "borrow" system memory, it is critical that you install two modules of equal capacity for optimum performance.

    The iMac "Core 2 Duo" 2.0 17-Inch, iMac "Core 2 Duo" 2.16 20-Inch, and iMac "Core 2 Duo" 2.16 24-Inch -- the "iMac (Late 2006)" models -- shipped with "at least 512 MB DDR2 SDRAM installed into the top slot". There is not a performance penalty for populating a single slot or populating both slots with different capacity modules.
    When all else fails, try everything!
    The Rep System and you.
    Life's a joke...If you're not laughing, then you didn't get it.

    June 2008


  4. #4
    iMac RAM
    harveydov's Avatar
    Member Since
    Apr 30, 2008
    Location
    UK
    Posts
    23
    Specs:
    MBP i7 2.0 15" Hi-Res 8gb RAM, 500GB / 32GB iPhone 4. Apple TV 2G++++
    soulwar, what is the source of your info, it's rather interesting!!!
    Harv

  5. #5
    iMac RAM
    Soulwar's Avatar
    Member Since
    Jan 27, 2008
    Location
    Estero, FL
    Posts
    1,515
    Specs:
    iMac 17" 1Ghz G4  iPhone 3G  10.5.5
    Quote Originally Posted by harveydov View Post
    soulwar, what is the source of your info, it's rather interesting!!!
    Everymac.com

    Great site for Apple specs and info!
    When all else fails, try everything!
    The Rep System and you.
    Life's a joke...If you're not laughing, then you didn't get it.

    June 2008


  6. #6
    iMac RAM
    harveydov's Avatar
    Member Since
    Apr 30, 2008
    Location
    UK
    Posts
    23
    Specs:
    MBP i7 2.0 15" Hi-Res 8gb RAM, 500GB / 32GB iPhone 4. Apple TV 2G++++
    Very helpful site. Many thanks

    Quote Originally Posted by Soulwar View Post
    Everymac.com

    Great site for Apple specs and info!
    Harv

  7. #7
    iMac RAM

    Member Since
    Jul 31, 2007
    Posts
    5
    Thanks for the replies. It looks like I have the early 2006 version and that it won't make a performance difference.
    Great link by the way, thanks

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