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  1. #1

    salmar's Avatar
    Member Since
    Jan 13, 2008
    Posts
    109
    Specs:
    20" alum iMac 2.4 3 gigs ram
    More ram for iMac
    I bought a new alum 20" iMac back in January and it had only 1 gig of ram and I would like to add another 2 gigs in the empty slot. I checked the crucial website and this is the ram suggested:

    Part #: CT715173 DDR2 PC2-5300 CL=5 Unbuffered NON-ECC DDR2-667 1.8V 256Meg x 64 more details


    Is this the correct ram for my 2.4 iMac? I am a new switcher to the Mac.
    Thanks for a reply.

  2. #2

    Soulwar's Avatar
    Member Since
    Jan 27, 2008
    Location
    Estero, FL
    Posts
    1,515
    Specs:
    iMac 17" 1Ghz G4  iPhone 3G  10.5.5
    The specs for your iMac. Looks like you have the right one.
    http://www.everymac.com/systems/appl...num-specs.html
    Supports 667 MHz PC2-5300 DDR2 SDRAM.

    http://eshop.macsales.com/MyOWC/Upgrades.cfm?model=271

    A how-to.
    http://support.apple.com/kb/HT1423?viewlocale=en_US
    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


  3. #3

    y-guy's Avatar
    Member Since
    Mar 12, 2008
    Posts
    133
    Specs:
    24" iMac 2.4 - 4GB RAM, Logitech S530 Kbrd/Mouse, Logitech Z2300 Speakers
    I picked up 4GB for my 24" imac using the crucial config app - works fine cost me about $100 for the RAM.

  4. #4

    salmar's Avatar
    Member Since
    Jan 13, 2008
    Posts
    109
    Specs:
    20" alum iMac 2.4 3 gigs ram
    Thanks for these two replies, but then in the first link that Soulwar gave me it said this:


    "Internally, some "Aluminum Core 2 Duo" models have faster processors than their predecessors, but all have a faster "Santa Rosa" motherboard design with an 800 MHz frontside bus (up from 667 MHz), additional RAM capacity, and both a Firewire "400" port and Firewire "800" port"

    See where it mentions 800MHz instead of the 667MHz though? Which one would be the right one then or it doesn't matter? Thanks

  5. #5


    Member Since
    May 29, 2008
    Posts
    39
    iMacs with support for 800MHz RAM were released starting in April 2008, so you don't have to worry about that. The RAM you listed above (667Mhz DDR2 SO-DIMM) is correct.

    One thing I would check is to see if your iMac shipped with a single 1GB stick, or two 512MB sticks. If it shipped with two 512MBs, then the practical implication is that you would have to replace one of them with the 2GB stick, giving you 2.5GB as opposed to 3GB (if you had a single 1GB stick and added the 2GB into the empty slot).

    Edit: Reading more closely, that doesn't seem to be your question, but the ultimate answer remains the same. The speed of the FSB is sometimes independent of the speed of the RAM, so a pre-April iMac may have an 800Mhz FSB, but still only supports 667Mhz RAM. The post-April iMacs actually have a 1066Mhz FSB, but only support 800Mhz RAM. Confused yet?

  6. #6

    salmar's Avatar
    Member Since
    Jan 13, 2008
    Posts
    109
    Specs:
    20" alum iMac 2.4 3 gigs ram
    Thanks for the replies, but in the first link Soulwar gave it said this:


    "Internally, some "Aluminum Core 2 Duo" models have faster processors than their predecessors, but all have a faster "Santa Rosa" motherboard design with an 800 MHz frontside bus (up from 667 MHz), additional RAM capacity, and both a Firewire "400" port and Firewire "800" port."

    Does the difference in the 800MHz and the 667MHz matter?

  7. #7

    salmar's Avatar
    Member Since
    Jan 13, 2008
    Posts
    109
    Specs:
    20" alum iMac 2.4 3 gigs ram
    Sorry for the double post. I wasn't sure it went thru the first time. Okay I understand now, thanks Dartholomew for clearing that up for me. Yes I have the 1 gig of ram installed now with an empty slot for the 2 gig module.
    Thanks to the three of you.

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