Windows 7 reports how much physical memory is currently installed on your computer along with how much memory is available to the operating system and the hardware reserved memory.
Windows 7 may show that the usable memory may be less than the installed memory (RAM)! The indicative Usable memory is a calculated amount of the total physical memory minus “hardware reserved” memory.
The following table defines the Resource Monitors current reported the status of the installed memory on a Windows 7-based computer.
The following table defines the Resource Monitors current reported status of the installed memory on a Windows 7-based computer.
To find out how memory is being used on your computer, type Resource Monitor in start search and hit Enter.
Click the Memory tab, and view the Physical Memory section at the bottom of the page.
For a full read visit KB978610.
Physical Memory Limits for Windows 7
Limits on memory and address space vary by platform, operating system, and by whether the IMAGE_FILE_LARGE_ADDRESS_AWARE value of the LOADED_IMAGE structure and 4-gigabyte tuning (4GT) are in use.
Limits on physical memory for 32-bit platforms also depend on the Physical Address Extension (PAE), which allows 32-bit Windows systems to use more than 4 GB of physical memory.
The following table specifies the limits on physical memory for Windows 7.
To learn more about the memory & address space limits for other Windows releases like Windows Server 2008, Windows Vista, Windows XP, Windows 2000, 32-bit / 64-bit, etc visit MSDN.
Why does Windows 7 show less RAM when 4 GB is installed and Physical Memory Limits for Windows 7 is sure to interest you too!