Memory and Money Saving

Discussion in 'Buying Tips and Advice' started by Harmush, Sep 1, 2009.

  1. Harmush macrumors 6502a


    Sep 21, 2008
    Hey, I have a new alu macbook and i want to put 4GB or DDR3 in it. It at the moment has got 2GB. I have found the cheapest price it think for 2x2GB. I also have a Alu iMac with DDR2 in it. I would soon like to also put 4GB in it. But can't afford to upgrade them both at once. What i am wondering is, can i replace the 2GB DDR2 in the imac with the 2x1GB DDR3 in the macbook, which will be discarded if i put 4GB in. Is that mac capable of running on DDR3. Just a little upgrade for both machine then i guess.

  2. Hellhammer Moderator


    Staff Member

    Dec 10, 2008
    No, you can't. DDR3 is not backwards compatible (different amount of pins) so it won't work in DDR2 slot. Same thing with DDR2 in DDR3 slot, won't work. You have to buy DDR2 for your iMac (dirt cheap, ~30$) and DDR3 for MacBook (little more, ~50$)

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