iBook G3 Dual USB not recognizing new RAM

Discussion in 'PowerPC Macs' started by tommer419, Jul 19, 2010.

  1. tommer419 macrumors newbie

    Jul 19, 2010
    College Park, MD
    Hi, I'm new here so go easy on me.

    I have an iBook G3 Dual USB with 256MB of RAM currently (128 on LB, and 128 in the user accessible slot under the keyboard). I bought a 512MB chip on eBay that meets the exact specs of the required RAM (512MB PC133 SDRAM SODIMM 3.3V) but when I insert it into the RAM slot and turn on the iBook, it says in About This Mac that I only have 128MB of RAM. Any suggestions to what I can do, or is the chip possibly not compatible with Apple?
  2. d88co88 macrumors 6502


    Dec 8, 2009
    Are you absolutely sure you seated it properly?
  3. OrangeSVTguy macrumors 601


    Sep 16, 2007
    Northeastern Ohio
    Sounds like you bought the high-density memory. Do you have the link to the auction that you won? Those iBooks were picky with memory so it's always best to stick with a name brand manufacturer. Crucial, OWC, Kingston... etc.

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