Differences Between PXI/PXIe Generations

Updated May 9, 2019

Reported In


  • PXI Chassis
  • PXI Remote Control Module

Issue Details

  • What is the compatibility between PXIe cards of different generations?
  • Can you use PXIe Generation 2 cards in a PXIe Generation 3 slot or vice versa? I want to make sure that I can to mix the different generation PXIe modules in the PXIe Generation chassis.
  • Can I replace a Gen2 PXIe module with a Gen3 PXIe module?


There are no physical slot differences between different generation of PXIe cards, however the different generations will have differences in data transfer rate. You can expect backward compatibility through various PXI/PXIe generations and can replace older modules with the newer version of that same module. For more information, refer to PXI Express FAQ.