Networking NVIDIA Firmware Tools (MFT) Documentation

efuse Utility

The efuse tool queries fuse-programmed voltage values from an NVIDIA networking device and displays them as a per-rail, per-die table in millivolts.

efuse Usage Example

$ efuse -d /dev/mst/mt53124_pciconf0

 

Option

Description

-d <device>

MST device path (required). E.g. /dev/mst/mt53124_pciconf0

-h

Show help and exit


 Requirements and Limitations

  • Device firmware must be running (livefish mode is not supported)

  • Individual fuse readings that fail or return invalid data are skipped, the tool continues with the remaining entries

  • A fuse-mismatch condition is reported inline as "Fuse mismatch detected" for the affected rail/die

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