3 basic ways to check NVIDIA hardware in Linux

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Detect NVLink(s) (if you have them installed): ‘nvidia-smi nvlink --status -i'

Detect physically installed devices that includes ‘nvidia’: ‘lspci | grep -i nvidia'

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For example:

lspci | grep -i nvidia

01:00.0 VGA compatible controller: NVIDIA Corporation Device 2204 (rev a1)
21:00.0 VGA compatible controller: NVIDIA Corporation Device 2204 (rev a1)

Motherboard PCI-e BUS ID (AKA: the PCI-e slot the GPU is installed in)

This could be up to 3 additional alphanumerical 4-digit ‘words’ (example below)

First is the PCI Device ID, the second is the PCI Subsystem Vendor ID, and the third is the PCI Subsystem Device ID.

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