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Thread: New iMac Memory

  1. #1


    Member Since
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    New iMac Memory
    Hi All

    First post here. I have recently handed on my old PC Notebook and got myself a MacBook Pro. Early next year I plan to change out my iMac for the new 27" iMac.

    The question I have is this, having upgraded the memory in the MBP to 8Gb I now have 2 x 2Gb DDR3 memory cards available. Therefore if I get the 27" new iMac with 4Gb is the memory from the MBP compatible and therefore I can upgrade the iMac to 8Gb effectively for free?

    Cheers
    Simon

  2. #2

    Lifeisabeach's Avatar
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    Maybe. The current iMac "supports 1066 MHz PC3-8500 DDR3 SO-DIMMs."
    iMac "Core 2 Duo" 3.06 21.5-Inch (Late 2009) Specs (Late 2009, MB950LL/A*, N/A, iMac10,1) @ EveryMac.com

    You didn't specify exactly which MacBook Pro you have. The current 15" and 17" models "support 1066 MHz PC3-8500 DDR3 SDRAM", which is identical to the current iMac.
    MacBook Pro "Core 2 Duo" 2.8 17" (Mid-2009) Specs (Mid-2009 17", MC226LL/A, N/A, MacBookPro5,2) @ EveryMac.com

    So if your RAM came from the above model MBP, then it should be perfectly compatible with today's iMacs. Of course, the iMac may get refreshed with a different spec of RAM by the time you get one, which may make this moot.

    EDIT: Doh! I overlooked how the iMac uses SO-DIMMS and the MBP does not. Sorry. They won't work.
    http://www.kingston.com/newtech/ddr/ddrvssdram.asp

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  3. #3

    bobtomay's Avatar
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    Wow, I hadn't noticed they'd changed all of the MBP's to SDRAM either.
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  4. #4


    Member Since
    Nov 25, 2009
    Location
    South Wales
    Posts
    2
    Specs:
    MBP 15.4", 2.66Ghz, 8Gb; iMac 20" 2.4Ghz, 4Gb
    Quote Originally Posted by lifeisabeach View Post
    Maybe. The current iMac "supports 1066 MHz PC3-8500 DDR3 SO-DIMMs."
    iMac "Core 2 Duo" 3.06 21.5-Inch (Late 2009) Specs (Late 2009, MB950LL/A*, N/A, iMac10,1) @ EveryMac.com

    You didn't specify exactly which MacBook Pro you have. The current 15" and 17" models "support 1066 MHz PC3-8500 DDR3 SDRAM", which is identical to the current iMac.
    MacBook Pro "Core 2 Duo" 2.8 17" (Mid-2009) Specs (Mid-2009 17", MC226LL/A, N/A, MacBookPro5,2) @ EveryMac.com

    So if your RAM came from the above model MBP, then it should be perfectly compatible with today's iMacs. Of course, the iMac may get refreshed with a different spec of RAM by the time you get one, which may make this moot.

    EDIT: Doh! I overlooked how the iMac uses SO-DIMMS and the MBP does not. Sorry. They won't work.
    Kingston Technology Company - New Technology - DDR vs SDRAM

    The memory I installed in my MBP was 204 Pin SO-DIMM DDR3 2 x 4Gb. So hopefully that's the same. Otherwise I'll have to budget extra to up the memory.

    My MBP is the latest 15" version running at 2.66, with replacement memory from Crucial.

    Regards
    Simon

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