Total system memory is listed incorrectly in Task Manager if 32-GB memory modules are installed on the system

Applies to: Windows Server 2012 R2 DatacenterWindows Server 2012 R2 StandardWindows 8.1


Consider the following scenario:
  • One or more 32-gigabyte (GB) memory modules are installed in the computer.
  • The computer is running a version of Windows that is listed in the "Applies to" section.
  • You view the Performance tab of Task Manager to view the total system memory.
In this scenario, you notice that the total system memory is listed incorrectly when you view the Memory category on the Performance tab of Task Manager. For example, on a computer that has 32-GB memory modules inserted in 21 slots, the total system memory is listed as "1.5 PB" as shown in the following screen shot (circled in red) instead of the correct value of 672 GB, which is shown correctly right under the circled text.

Additionally, information is also listed incorrectly when you rest the mouse pointer over the Slots used field. (This field displays the tool tip that lists the individual slots and memory modules.)

Performance tab


This problem occurs because of the way memory is calculated from the System Management BIOS (SMBIOS) memory device information.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

More Information

The memory results that are displayed by Task Manager are a purely a cosmetic issue and will not cause any adverse effect in the functionality of the operating system or applications.