4GB or RAM is installed but only 2 GB is usable.

Discussion in 'Windows Small Business Server' started by Wes Sothard, May 10, 2007.

  1. Wes Sothard

    Wes Sothard Guest

    I have just taken a new job and one of my new tasks is updating a server.
    Windows 2003 Small Business was installed. It was installed with 2 GB of
    memory installed. We have since had some application upgrades and wanted to
    move to using 4 GB of RAM. After installing the new 2 GB or RAM the server
    only shows 2 GB. Also, the server is not able to handle the new software.
    We are recieving error messages for memory allocation. Is there something
    that I have to do to expand the memory space to read the new memory? I
    thought it would be able to just auto-expand and be able to read/utilize the
    added memory. I guess I am wrong though. Any help would be great!

    Thanks all!
    Wes Sothard, May 10, 2007
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  2. Wes Sothard

    Rob C Guest

    Can the server hardware handle 4Gb?
    I have added more memory to a few SBS servers and it has worked without
    having to alter any settings.
    Rob C, May 10, 2007
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  3. If it's not PAE, check BIOS (both settings and to make sure it's current)
    and chipset drivers. There are a variety of causes for this, that seem
    generally to relate to that type of thing.

    If PAE is enabled, you'll be able to see it in CP-> System. The bottom line
    will say "Physical Address Extension." Don't use the /3GB switch on SBS.
    Dave Nickason [SBS MVP], May 10, 2007
  4. Wes Sothard

    Alan Nelson Guest

    Make sure the server BIOS knows its in there. If the BIOS can recognize it, I
    would think that the op system will as well.

    Alan Nelson
    Alan Nelson, May 10, 2007
  5. Wes Sothard

    Wes Sothard Guest

    All specs for the equipment state that it is able to handle up to 4 GB of
    RAM. I will verify BIOS setting tomorrow. It is a primary server, so for
    something like this, shutting it down right away is not always an option.

    Thanks for all the prompt as well as expediant aid! I will use your
    assistance and see if I can manage to get the server working properly.

    Wes S.
    Wes Sothard, May 11, 2007
  6. Hi Wes,

    I recently bought an AMD64 server, and the max memory depends upon what
    kind of RAM you install. More precisely, if I use DDR-400 the max RAM
    is 64GB, but if I use DDR-667 RAM, the maximum is less -- I think it's
    32GB RAM if I remember right.

    Anyway, I just wanted to let you know that the type of installed RAM may
    be the cause of your 2GB limit.

    -- Steve M
    Steve Moffett, May 11, 2007
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