Mew White Macbook accepts 3GB Memory Upgrade but NOT 4GB Upgrade

Discussion in 'Mac Basics and Help' started by bruceaparry, Feb 25, 2009.

  1. bruceaparry macrumors newbie

    Feb 25, 2009
    I have just taken delivery of a new white Macbook and I upgraded HD to WD Scorpio Blue 500 GB HD and memory to Corsair VSA4GSKIT667C4 Mac Memory 4GB 2 X 2GB PC2-5300 667MHz200 -Pin SODIMM for apple laptops.

    It would not work even after correctly reinstalling the new memory a number of times

    I decided to put back the original memory but by mistake I installed one old dimm and one new dimm and the computer then installed Mac OS X on the new HD and works OK.
    Info shows 3GB of Memory = 1 x 2 GB and 1 x 1 GB.

    Why will it not accept 4 GB?
  2. velocityg4 macrumors 601


    Dec 19, 2004
    Did you try swapping the 2GB Dimm that is working in there with the other module you accidentally left out?
    It could just be that the other module is defective.

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