iMac White 24" Maximum Ram?

Discussion in 'iMac' started by sukanas, Jun 9, 2008.

  1. sukanas macrumors 6502a


    Nov 15, 2007
    i know the website says 3gb
    but like the mac mini

    if i put in 2x2gb ram, will it recognize it a little more than 3gig?
  2. sfroom macrumors regular

    Apr 30, 2008
    I had 2 x 2 GB in my white iMac before I sold it. The computer "recognizes" all 4 GB, which is to say that "about this mac" displays 4GB installed.

    Activity monitor also displays 4GB, however, if you add up the "wired"/"active"/"free" etc...the math doesn't add up to 4.

    My understanding is that the system will actually address 3.3 GB.
  3. ChrisA macrumors G4

    Jan 5, 2006
    Redondo Beach, California
    The OS will use not more than 3.3GB .7 will go unused. But I think you gain a little because with matched RAM sticks the system can do double wide memory access, I think the speed gain from that is about 6%
  4. tuxtpenguin macrumors regular

    May 19, 2007
    Like the above posters said, you can put in 4 GB but it will only address roughly 3.3 but the matched pairs will help.

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