Hi,
Still no clue. Here's the output:
lspci -nn -v | grep Mellanox
82d1:00:02.0 Ethernet controller [0200]: Mellanox Technologies MT27500/MT27520 Family [ConnectX-3/ConnectX-3 Pro Virtual Function] [15b3:1004]
Subsystem: Mellanox Technologies Device [15b3:61b0]
9832:00:02.0 Ethernet controller [0200]: Mellanox Technologies MT27500/MT27520 Family [ConnectX-3/ConnectX-3 Pro Virtual Function] [15b3:1004]
Subsystem: Mellanox Technologies Device [15b3:61b0]
For ESXi65 the offline bundle Download VMware vSphere contains in \metadata\vibs the nmlx4core file with PCIID 15b31004.
Bundling the esxi ISO on a windows box worked!
# Download and store MLNX-NATIVE-ESX-ConnectX-3_3.16.11.10-10EM-650.0.0.4598673-offline_bundle-12539849.zip in j:\driver-offline-bundle
cd j:
j:\ESXi-Customizer-PS-v2.6.0.ps1 -ozip -v65
j:\ESXi-Customizer-PS-v2.6.0.ps1 -izip j:\ESXi-6.5.0-20191203001-standard.zip -v65 -pkgDir j:\driver-offline-bundle
So far the setup throws no network adapters detected in all tests ESXi65u3, ESXi67u3 or with vanilla ESXi67u3 ISO.
Found kb VMware Knowledge Base. Strange...