Archived:NI MAX Does Not Show Added RAM in PXI Controller

Updated Nov 7, 2018

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Reported In


  • PXI-8110
  • PXI Controller
  • RAM for Controllers

Issue Details

I have upgraded the RAM in my PXI Controller (Windows, Real-Time OS) to 4GB from 2GB. If I look in the BIOS, it recognises that it has 4GB of RAM, but in MAX or the Distributed System Manager (DSM) it only recognises 2GB of memory.


To resolve this issue, update the BIOS of the PXI to the latest version available and then restart the PXI.

Additional Information

If updating the BIOS does not resolve the issue for PXI systems running Windows operating systems, try the following steps 

1. Click Start and type msconfig in the search programs and files box, and then click msconfig in the Programs list.  
2. In the System Configuration window, click Advanced options on the Boot tab.  
3. Click to clear the Maximum memory check box, and then click OK.  
4. Restart the computer.  
5. Boot the system and enter the BIOS settings while the computer is booting (see the User's Guide for your computer for instructions on how to boot to system setup on your computer)
6. Search for a setting called memory remapping, memory extension, or something similar. Note, the location of this setting and name used changes between different hardware vendors. 
7. Ensure this setting is enabled. 

Note, for 32-bit systems with 4GB of memory installed, it is expected for about 3GB to be available to the operating system and therefore 3GB of RAM reported in NI MAX. This is because the BIOS reserves some memory for the video card,device enumeration and other mother board requirements). 


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