How Much RAM Can I Use When I Set My PXIe-8880 RT as NI Linux RT OS?

Updated Nov 15, 2019

Reported In


  • PXIe-8880

Operating System

  • NI Linux Real-Time

Issue Details

I have a PXIe-8880 RT controller running NI Linux Real-Time operating system(RT OS). How much RAM can I use in PXIe-8880 with NI Linux RT OS?


Because PXI platform based NI Linux RT is 64-bit OS, RAM size is not limited to 4GB as Phar Lap ETS. However, due to the hardware limitation, PXIe-8880 has a maximum RAM listed as 24GB RAM.

Additional Information

PXIe-8880 can hold up to 24G RAM, utilizing three 72-bit DDR4 SDRAM sockets of the SO-DIMM block. Each socket can hold up to 8 GB. For more information, please refer to this document: Additional RAM for PXI and PXIe Controllers