Can [early '07?] support 4GB RAM?

Discussion in 'MacBook' started by illegallydead, Nov 4, 2008.

  1. illegallydead macrumors 6502a

    illegallydead

    Joined:
    Oct 22, 2007
    Location:
    Colorado!!!
    #1
    As the title aptly suggests, my question is: can the older, I believe mine is the early '07, Macbooks support up to 4GB of RAM? I know that crucial lists 2GB as the max, and I believe that Apple lists 2 as the max as well.
    Anyone know for sure if this will work? Anyone have 4 in there?
    Kind of curious. Thanks for the help.
     
  2. Eidorian macrumors Penryn

    Eidorian

    Joined:
    Mar 23, 2005
    Location:
    Indianapolis
    #2
    You can put in 4 GB but only ~3GB is addressable.
     
  3. illegallydead thread starter macrumors 6502a

    illegallydead

    Joined:
    Oct 22, 2007
    Location:
    Colorado!!!
    #3
    Thanks. Is this something that we are thinking Snow Leopard might address, or is it more of a hardware limitation for some reason?
     
  4. Eidorian macrumors Penryn

    Eidorian

    Joined:
    Mar 23, 2005
    Location:
    Indianapolis
    #4
    The chipset can only support 32-bit addressing.
     
  5. mrrish macrumors regular

    mrrish

    Joined:
    Feb 14, 2008
    #5
    I had 2x2 GB sticks on my BlackBook early '07 model. Only 3GB is really adressible, though if you play video games, you will get usage higher than 3GB because the video memory (GMA950) can address a specific region of your memory that your system can't. So we are looking at ~3256 MB at max usage.

    The good thing about having 4 GBs is that the two identical sticks will provide dual channel read/write capabilities which make your system run faster overall.

    Would recommend the above over a 1GB x 2GB configuration, seeing as you probably have 2 x 512 MB right now if you're still at stock.
     
  6. illegallydead thread starter macrumors 6502a

    illegallydead

    Joined:
    Oct 22, 2007
    Location:
    Colorado!!!
    #6
    Right on, good to know. I have the 2GB, 2x1GB setup. Just looking to get a bit more around the holidays if possible :D
    Thanks for all the help.
     
  7. iag48 macrumors regular

    Joined:
    Jan 26, 2008
    #7
    Hate to hijack your thread but I currently have 2 x 1gb sticks in my black macbook (2.0 core2duo) and I have an extra 2gb stick laying around. Should I add the 2gb stick and 1gb ? or just leave it 2 x 1gb?
     
  8. Neil321 macrumors 68040

    Neil321

    Joined:
    Nov 6, 2007
    Location:
    Britain, Avatar Created By Bartelby
    #8
    If it were me id buy another 2GB stick, its recommended that you use matched pairs for dual channel support
     
  9. iag48 macrumors regular

    Joined:
    Jan 26, 2008
    #9
    Neil, pardon my ignorance but I read that my late 2006 black MB does only addresses 3.2 gb of ram. Therefore wouldn't 4gb be redundant?

    Or are you saying that although only 3.2 will be recognize that by using in pairs the memory will be more effective?
     
  10. Neil321 macrumors 68040

    Neil321

    Joined:
    Nov 6, 2007
    Location:
    Britain, Avatar Created By Bartelby
    #10
    Yep thats what trying to say even though it'll only recognize 3.2 you will benefit from dual channel support by using matched pairs
     

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