PAE X86 Tools and Settings

Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2

PAE X86 Tools and Settings

In this section

  • PAE X86 Registry Entry

  • Related Information

The following section describes one registry entry associated with Physical Address Extension (PAE) X86.


  • PAE X86 is not required on the 64-bit versions of the Windows Server 2003 family.

PAE X86 Registry Entry

The following registry entry is associated with PAE X86.

The information here is provided as a reference for use in troubleshooting or verifying that the required settings are applied. It is recommended that you do not directly edit the registry unless there is no other alternative. Modifications to the registry are not validated by the registry editor or by Windows before they are applied, and as a result, incorrect values can be stored. This can result in unrecoverable errors in the system. When possible, use Group Policy or other Windows tools, such as Microsoft Management Console (MMC), to accomplish tasks rather than editing the registry directly. If you must edit the registry, use extreme caution.


Registry path

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\


Windows Server 2003, Enterprise Edition, and Windows Server 2003, Datacenter Edition

This registry key determines the number of bytes allocated to the paged pool. It can be reduced in order to provide additional space for Paged Table Entries (PTEs). This is sometimes necessary when using PAE X86 in conjunction with 4-gigabyte tuning (4GT). However, because some computers require a certain amount of paged pool area size, reducing this value will not be an option in all cases. You should not typically need to change this registry value. The operating system calculates an optimal value for this entry based on the amount of physical memory on the computer.


  • Incorrectly editing the registry may severely damage your system. Before making changes to the registry, you should back up any valued data on the computer.

The following resources contain additional information that is relevant to this section.