Will my old 24" imac memory work in the new 27" imac?

Discussion in 'Mac Basics and Help' started by johnnyfox, Oct 25, 2009.

  1. macrumors newbie

    Joined:
    Oct 21, 2009
    #1
    Hi guys - can anyone help me please? My old 24" iMac died on me (kernel panic and probable hardware failure). I am getting the new 27" iMac (I guess the i5 quad, as I use Aperture a lot).

    I have 2 memory sticks (1GB and 2GB) from the old 24" which I want to use in the new 27", to increase the memory from 4GB to 7GB.

    However, the old memory sticks are 667 speed (Kingston KVR667D2S5) - will they work together with the 1066 mhz ddr3 sdram in the new macs? As there are 4 slots, there is space, but does the memory have to be the same speed? Will it slow it down?

    If I cannot use it, I will probably give it to a friend with an old imac - but maybe there is some use I can get out of the broken machine.

    Thanks!
    JF
     
  2. macrumors 6502

    Joined:
    Apr 15, 2006
    #2
    Nope.
     
  3. thread starter macrumors newbie

    Joined:
    Oct 21, 2009
    #3
    Any reason it won't work - is it because the slots are physically different, or because the speed is different?
     
  4. macrumors 601

    Joined:
    Aug 15, 2005
    #4
    The speed and the slots are different. The 667Mhz RAM is DDR2 and the new iMac uses DDR3.
     

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