PXIe Chassis Does Not Appear in MAX with Fiber Cable MXI-Express Card

Updated Dec 18, 2018

Reported In


  • PCIe-8381
  • PXIe-8384
  • PXIe-8383MC
  • PXIe-8381
  • MXI-Express Fiber Optic Cable


  • PXI Platform Services

Operating System

  • Windows

Issue Details

I'm using a PCIe-8381, connected to a  PXIe-8384 with a fiber cable. Windows Device Manager shows the PCI to PCI bridges but one of the following might occur:
  • MAX shows the PCIe-8381, but not the chassis
  • MAX can't find the card or the chassis
  • Windows Device manager doesn't show the National Instruments SMBus Controller
Are there any additional things I need to consider when using this cable?


You must change the clock setting using the toggle switch on your PCIe-8381 and PXIe-8384 or PXIe-8383mc MXI-Express remote controller modules. The location of these toggle switches can be found here:

Further information can be found in the MXI-Express Fiber Cable Getting Started Guide.

Additional Information

The x8 MXI-Express fiber cable requires a constant frequency clock (CFC) be provided to the cable. x8 PCIe 2.x and PXIe remote controllers use spread spectrum clocking (SSC) by default.

If you are already using constant frequency clocking and cannot see your chassis in MAX, please refer to the MXI Compatibility and Connectivity Troubleshooting Guide for additional steps.

If you are experiencing this issue with a PCIe-8381 card with Windows 10 operating system, refer to Windows 10 PC Will Not Boot with PCIe-8381 Card Installed or additional steps.


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