Wrong Memory Size Reported

Last Reviewed: 14-Mar-2016
Article ID: 000007261

Usable memory is the amount of the total physical memory minus hardware-reserved memory. It is normal for the operating system to report slightly less usable memory compared to installed memory, as in the following example.

Usable memory

Hardware-reserved memory is expected and can be affected by several factors:

  • Devices installed in the computer, and the memory that is reserved by those devices
  • System BIOS version and settings
  • Operating system version that is installed
  • Other system settings

If your system shows that there is much less usable memory than expected, less than 3 GB, try updating the system BIOS to the latest version available on Download Center.

This article applies to: