Memory size?

Discussion in 'MacBook Pro' started by fyyy, Oct 3, 2008.

  1. fyyy macrumors newbie

    Joined:
    Oct 3, 2008
    #1
    I have this Macbook Pro of 2.33GHz processor. It came with 2G memory. I recently bought 2x2G memory and upgraded it. The weird thing is, when I open 'About this Mac', it shows 4G memory. But in the Activity Monitor, only shows 3G memory in total. anybody knows why??

    Thanks!
     
  2. Cave Man macrumors 604

    Cave Man

    #2
    Your Calistoga chipset's memory controller is 32-bit. "About" tells you what's physically installed; "Activity" tells you how much it can use.
     
  3. fyyy thread starter macrumors newbie

    Joined:
    Oct 3, 2008
  4. Cave Man macrumors 604

    Cave Man

    #4
    It's probably addressing 3.2 or 3.3 gb, so you're losing 0.8 to 0.7 gb. But by using identical chips (2x2 gb) you get dual-channel performance boost (probably only a couple of percents).
     
  5. fyyy thread starter macrumors newbie

    Joined:
    Oct 3, 2008
    #5
    Thanks for the reply, but it is showing 3.00G

    I just found another post says that the max memory supported on my computer is 3G. so should I use one of the original 1G memory and one of the 2Gs?
     
  6. aleksandra. macrumors 6502a

    Joined:
    Sep 13, 2008
    Location:
    Warsaw, Poland
    #6
    As someone already mentioned, by using identical stick you should get some speed improvement (though I don't think it'd be much noticeable). So unless you plan to sell it or something, better use the 2GB one.
     

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