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Windows Server 2000/2003 Thread, Server 2003 R2 (32-Bit) Max Memory in Technical; Hi Everybody Does anyone know what the maximum memory Server 2003 R2 (32-Bit) can 'see'? And what happens if you ...
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    Server 2003 R2 (32-Bit) Max Memory

    Hi Everybody

    Does anyone know what the maximum memory Server 2003 R2 (32-Bit) can 'see'? And what happens if you have more than that installed?

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    The maximum amount of memory that can be supported on Windows Server 2003 is 4 GB. However, Windows Server 2003, Enterprise Edition supports 32 GB of physical RAM and Windows Server 2003, Datacenter Edition supports 64 GB of physical RAM using the PAE feature.

    The virtual address space of processes and applications is still limited to 2 GB unless the /3GB switch is used in the Boot.ini file. When the physical RAM in the system exceeds 16 GB and the /3GB switch is used, the operating system will ignore the additional RAM until the /3GB switch is removed. This is because of the increased size of the kernel required to support more Page Table Entries. The assumption is made that the administrator would rather not lose the /3GB functionality silently and automatically; therefore, this requires the administrator to explicitly change this setting.

    The /3GB switch allocates 3 GB of virtual address space to an application that uses IMAGE_FILE_LARGE_ADDRESS_AWARE in the process header. This switch allows applications to address 1 GB of additional virtual address space above 2 GB.

    The virtual address space of processes and applications is still limited to 2 GB, unless the /3GB switch is used in the Boot.ini file. The following example shows how to add the /3GB parameter in the Boot.ini file to enable application memory tuning:

    [boot loader]
    timeout=30
    default=multi(0)disk(0)rdisk(0)partition(2)\WINNT
    [operating systems]
    multi(0)disk(0)rdisk(0)partition(2)\WINNT="????" /3GB

  3. Thanks to EduTech from:

    beast_gts (17th June 2009)

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    EduTech's Avatar
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    Quote Originally Posted by john View Post
    yeah meant to put that lol... so not with it tonight.. think i am just going to knock myself out and go sleep lol

    Easier to get it from a source, then to type it all out :-)

    James.
    Last edited by EduTech; 17th June 2009 at 11:30 PM.

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    Thanks, and I also found this one: Memory Limits for Windows Releases (Windows).

    The IT Manager has bought more memory than the server can handle... Should be fun

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    Quote Originally Posted by beast_gts View Post
    Thanks, and I also found this one: Memory Limits for Windows Releases (Windows).

    The IT Manager has bought more memory than the server can handle... Should be fun
    Shouldn't he of researched before buying...........

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    Quote Originally Posted by IanT View Post
    Shouldn't he of researched before buying...........
    He said he did research it, and Crucial said the server can take 32GB of RAM...

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    Quote Originally Posted by beast_gts View Post
    He said he did research it, and Crucial said the server can take 32GB of RAM...
    Yeah the server may take 32Gb of RAM Physical but surely he must of known about the 32-bit Limitations

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