JSI Tip 10175. How can I verify that Physical Address Extension is enabled on my Windows Server 2003?

PAE (Physical Address Extension) enables your server to use more than 4 GB of RAM.

If you run Winver.exe and it reports more than 4 GB of memory, then the PAE specification is being used.

The /PAE switch in the C:boot.ini file enables PAE, but some servers with hot plug memory enable PAE when the /PAE switch is NOT set in the C:boot.ini file, unless the /NOPAE switch is set. The /NOPAE switch in the C:boot.ini file disables PAE.

To verify that the /PAE switch is enabled on your server:

NOTE: The follow scriplet uses GetMEM.bat and VarLen.bat.set PAE=0x0:: NOTE: PAE is enabled when PAE=0x1call :getPAE>nul 2>&1 if "%PAE%" NEQ "0x0" ( @echo PAE is enabled on %ComputerName%. Memory is %MB% MB.) ELSE ( @echo PAE is NOT enabled on %ComputerName%. Memory is %MB% MB.). . .. . .:getPAEcall GetMem MBset key="HKLMSYSTEMCurrentControlSetControlSession ManagerMemory Management"for /f "Tokens=2*" %%a in ('reg query %key% /V PhysicalAddressExtension^|find "REG_DWORD"') do ( set PAE=%%b)goto :EOF