512 megs of video ram in xp on a 2.4 ghz sr MBP?

Discussion in 'MacBook Pro' started by ph0rk, Aug 27, 2007.

  1. ph0rk macrumors 6502


    Oct 22, 2003
    Apologies if this is a repeat - one can imagine how searching would fail.

    I have a new SR 2.4 macbook pro, and have installed 4 gigs of ram (from OWC).

    Everything works fine, however, in XP sp2 (bootcamp), the machine only sees 3 gigs of system memory, and -512- megs of video ram.

    Has anyone else seen anything like this?
  2. Krevnik macrumors 68040


    Sep 8, 2003
    For whatever reason, XP only sees 3GB if you have 4GB on any of Apple's machines, and a few other PC OEM machines as well. Vista fixes this particular issue.

    As for VRAM, it is displaying total VRAM available (both dedicated, and RAM shared with system memory).
  3. Anonymous Freak macrumors 603

    Anonymous Freak

    Dec 12, 2002
    The 32-bit versions of Windows (including Vista) can only properly take advantage of 3 GB of RAM. XP only bothers showing 3 GB, while Vista will show the full 4 GB, even though it's really only using 3 GB. (Technically, anything over the 3 GB mark is reserved for system use, wether it needs it or not.)

    And yes, it will show the video RAM available both native and 'shared system'. This doesn't mean that 256 MB of your main memory is actually in use by the video chip, just that it's available should you need it.

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