[thopok]

PAE mode is enabled by adding the /pae parameter to your Boot.ini file in the root folder of the system drive.

•The computer has 4 or more gigabytes (GB) of RAM.
•The computer is using Physical Address Extension (PAE) mode.

A to ovdje (ni)je slučaj…
The RAM reported by the System Properties dialog box and the System Information tool is less than you expect in Windows Vista or in Windows XP Service Pack 2

EDIT:
•Click Start, click Run, type msinfo32.exe in the Open box, and then click OK.

Isto je i u System Information?