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Topic: XP and 4GB Ram

  1. #1

    XP and 4GB Ram

    Anyone else having problems getting XP to recognize 4GB ram?

    My system bios is reporting 4GB ram, and I know that my motherboard supports it (Supermicro X5DAL-G). But XP Pro keeps reporting that I have 3.50 GB Ram. [img]/ubbthreads/images/graemlins/confused.gif[/img]

  2. #2

    Re: XP and 4GB Ram

    All mainboards (apart from Athlon 64 kinds) I know off, only
    have the ability to support up to 3.5 GB of RAM. For this to
    work, you need to insert 4 GB of RAM, but .5 GB are just lost,
    cause this address-space is needed for mainboard-internal
    purposes (on-board hardware, pci...)


  3. #3

    Re: XP and 4GB Ram

    Ah, well that\'s good to know. Thanks Tobias.

    On another note, I\'ve been experiencing problems with my Echo Mona after adding the additional 2GB. The sound will cut out and I have to reboot. When I remove the additional memory, I don\'t have the problem anymore. I\'ve also tried going with 3GB of memory, but the same problem occurs.

  4. #4

    Re: XP and 4GB Ram

    Usermode-applications cannot use more than 2 GB (or 3 GB with the
    special 3GB switch on some OS versions). But the kernel-drivers and
    the OS kernel-components may use the rest.

    I assume that all these limits will quickly fall away with the new
    AMD and Intel 64bit extensions. The new version of W2K3 which
    supports this is supposed to be available in Q3. Porting drivers
    is supposed to be pretty easy, some 64bit drivers are available
    already. But I think it will take some time until we see 64bit
    applications in wide use... But I guess that video & audio-
    applications will be the first to use this new architecture,
    cause they gain most of it...


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