What differents between 32-bits and 64-bits?

Discussion in 'Mac Basics and Help' started by EntryLevel, Jul 14, 2008.

  1. EntryLevel macrumors newbie

    Jun 18, 2008
    Hi Mac Expertise, anyone can explain to me what is the different between 32-bits and 64-bits? I had read in one article that says that 32-bits can only apply 3GB of RAM. Although we install 4GB of RAM but it only run 3GB. Is that true? Anyone tested before how many GB of RAM are using when you install 4GB of RAM into your system?
  2. Tallest Skil macrumors P6

    Tallest Skil

    Aug 13, 2006
    1 Geostationary Tower Plaza
    Hundreds of people have four gigs of RAM installed but only see 3.3 when they've unwittingly installed 32-bit Windows.

    The difference has to do with addressable space.

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