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Thread: iMac Memory Specifications FAQ

  1. #1
    MODERATOR JerryHorn's Avatar
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    Post iMac Memory Specifications FAQ

    iMac: Memory specifications and upgrades

    Summary

    Learn about the types of random access memory (RAM) and video memory (VRAM) used in iMac computers. For specific instructions on installing memory, refer to the linked documents.



    Products Affected

    iMac, iMac (21.5-inch, Mid 2011), iMac (27-inch, Mid 2011)


    Learn how to identify which iMac model you have, then refer to this table.
    iMac Model Max. DRAM User
    Installable
    Slot
    AASP
    Installable
    Slot
    Video/
    VRAM
    Notes
    iMac (27-inch, Mid 2011) 16 GB PC3-10600
    (1333) DDR3
    204-pin
    SO-DIMM
    512 MB GDDR5 SDRAM and
    1 GB GDDR5 SDRAM
    2
    iMac (21.5-inch, Mid 2011) 16 GB PC3-10600
    (1333) DDR3
    204-pin
    SO-DIMM
    512 MB GDDR5 SDRAM 2
    iMac (27-inch, Mid 2010) 16 GB PC3-10600
    (1333) DDR3
    204-pin
    SO-DIMM
    512 MB GDDR3 SDRAM and
    1 GB GDDR5 SDRAM
    2
    iMac (21.5-inch, Mid 2010) 16 GB PC3-10600
    (1333) DDR3
    204-pin
    SO-DIMM
    256 MB up to 512 MB GDDR3 SDRAM 2
    iMac (Late 2009) 16 GB PC3-8500
    (1066) DDR3
    204-pin
    SO-DIMM
    256 up to 512 MB GDDR3 SDRAM 2
    iMac (Mid 2009) 4 GB PC3-8500
    (1066) DDR3
    204-pin
    SO-DIMM
    256 up to 512 MB GDDR3 SDRAM
    iMac (Early 2009) 8 GB PC3-8500
    (1066) DDR3
    204-pin
    SO-DIMM
    256 up to 512 MB GDDR3 SDRAM
    iMac (Early 2008) 4 GB PC2-6400
    (800) DDR2
    200-pin
    SO-DIMM
    128 or 256 MB GDDR3 SDRAM
    iMac (Mid 2007) 4 GB PC2-5300
    (667) DDR2
    200-pin
    SO-DIMM
    128 or 256 MB GDDR3 SDRAM
    iMac (Late 2006) 4 GB PC2-5300
    (667) DDR2
    200-pin
    SO-DIMM
    128 MB GDDR3 SDRAM 1
    iMac (Mid 2006) and iMac (17-inch Late 2006 CD) 2 GB PC2-5300
    (667) DDR2
    200-pin
    SO-DIMM
    64 MB GDDR3 SDRAM
    iMac (Early 2006) 2 GB PC2-5300
    (667) DDR2
    200-pin
    SO-DIMM
    128 MB GDDR3 SDRAM

    Notes:
    • All iMac models have multiple memory slots. See articles for each individual iMac model to learn how much memory can be installed in each slot.
    1. Although the iMac (Late 2006) computers will accept up to a 2 GB SO-DIMM in each of the two memory slots, the iMac will only support 3 GB total memory.
    2. The iMac (Late 2009), iMac (Mid 2010) and iMac (Mid 2011) have four SDRAM slots, each of which can accept a 2 GB or 4 GB SO-DIMM.
    Additional Information

    Learn more about the memory specifications on iMac computers:

  2. #2
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    Jerry,


    That's a great post!

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