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http://support.microsoft.com/kb/946003/en-us
Windows Vista SP1 will report 4 GB of system memory (RAM) on systems that have 4 GB of memory installed
INTRODUCTION
After you install Windows Vista Service Pack 1 (SP1), the memory (RAM) value reported by Windows Vista may increase if the following conditions are true:
•The system BIOS has reserved physical memory for graphics or for other peripherals.
•Your computer has more than 3 GB of system memory installed.
This change occurs because Windows Vista with SP1 reports how much physical memory installed on your computer. All versions of Windows NT-based operating systems before Windows Vista Service SP1 report how much memory available to the operating system. This change in Windows Vista SP1 is a reporting change only.
You will see this reporting change in the following locations:
•RAM value in the Welcome Center.
•Memory value at the bottom of the My Computer windows.
•Memory (RAM) value in the System Properties windows.
•The Total amount of system memory value of the View and Print Details page of the Performance Information and Tools item in Control Panel.
Additionally, the System Information tool (Msinfo32.exe) now displays the following entries on the System Summary page:
•Installed Physical Memory (RAM)
•Total Physical Memory
•Available Physical Memory
The installation of Windows Vista SP1 will not change the reporting in the following diagnostic tools:
•The Performance tab in Task Manager
•WinVer
•DirectX Diagnostic Tool (DXDiag.exe) |
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