Changing Amount of Shared Memory in Windows 7 on BootCamp

Discussion in 'Windows, Linux & Others on the Mac' started by mr.staggs, Jan 19, 2010.

  1. mr.staggs macrumors newbie

    Jul 11, 2008
    I installed win 7 Home Premium, and I am being robbed of my ram because I can't change the shared video memory settings. Does anyone have a solution to this? I have the iMac with the ATI 4670 so I already have plenty of VRAM for what I do.
  2. Anonymous Freak macrumors 603

    Anonymous Freak

    Dec 12, 2002
    You are not being robbed. Windows 7 lets video cards "stake a claim" to system RAM as extra VRAM, but it will only be used if you are ever in a situation where the video driver actually *NEEDS* it, and it's available. (In a game where system RAM needs are lower than VRAM needs, for example.)
  3. mr.staggs thread starter macrumors newbie

    Jul 11, 2008
    ok well, I just made an "educated" guess thinking that was my problem. Is that why when I go to system properties, it says 4.00 GB (2.9 Available)?
  4. alexboy45 macrumors regular

    Nov 7, 2007
    if it is anything like windows xp 32bit, Wdows can only address 4gb memory. this includes vga memory. if you add them together you may see that it adds up to 4gb
  5. balamw Moderator


    Staff Member

    Aug 16, 2005
    New England
    mr.staggs it definitely sounds like you installed a 32 bit version of Windows. If you had installed a 64 bit edition and some RAM was being reserved for the GPU you should see closer to 3.5-3.7 GB available.

    If you bought Windows retail, just install from the 64 bit disc instead.


Share This Page