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  1. #1

    Member Since
    Dec 27, 2009
    imac g3 memory problems
    I just received a stick of 512MB of ebay, and am having trouble getting it to work with my existing RAM.
    So here's the situation, and what the stickers stay on each stick of memory:

    1) 512MB - PC 2700 333Mhz DDR (this is the new one)

    2) 512MB - PC-133 133Mhz

    3) 128MB - PC-100 100Mhz

    So, number 2 and number 3 above work with each other (which is what I had initially), but when I put in the new stick of 512 (number 1 above), it is not detected at all. The new stick appears to be fine by itself, but is not detected with either stick of my existing RAM.

  2. #2

    Collin Bl's Avatar
    Member Since
    Apr 07, 2009
    Napier NZ
    27 iMac+Thunderbolt, iMac 20, 2TB dual TC, AppleTV, iPh4S
    Get another PC100 or PC 133 the PC2700 is for a later unit.

  3. #3

    hughvane's Avatar
    Member Since
    May 18, 2008
    Amberley, Canterbury, New Zealand
    MacMini 4.1, OS 10.11 and 10.6; Macbook Pro 8.2, OS 10.12, MacBook 4.1, OS 10.6.8
    The PC133 will work okay, but at the slower 100 speed; the PC2700 is for the G4 iMac and eMac. Be wary too of buying high density RAM made for Win PC's. Not good. The best place I know for buying Mac-suitable RAM is Apple iMac Memory Upgrades and Video Installation Guides - Get the right memory for your G3, G4, G5, or Intel iMac Model. Even from NZ, I buy RAM there.
    Please post your Mac (or other) specs and MacOS version in your post, your profile or your signature. It helps us to help you better.

    I'm leaving now to go and find myself. If I should return before I get back, please ask me to wait.

  4. #4

    pigoo3's Avatar
    Member Since
    May 20, 2008
    2011 13" MBP 2.3ghz, 8gig ram, OS 10.8.5
    You definitely need to use the PC133 or PC 100 with your G3 iMac. Also consider that PC100 or PC133 that is compatible with Windows computers may not always be compatible with a Macintosh iMac G3.
    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  5. #5

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Nambucca Heads Australia
    iMac, i7 4GHz, 32GB memory, 1TB Blade Drive, OS X.13.4
    The PC133 will work okay SUBJECT to it being low density Mac compatible and if you purchased it from a Mac dealer on eBay. Most PC memory is high density and will not work in your iMac, causing kernel panics.

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