Here's the lspci output:
9365:00:02.0 Ethernet controller: Mellanox Technologies MT27500/MT27520 Family [ConnectX-3/ConnectX-3 Pro Virtual Function]
b260:00:02.0 Ethernet controller: Mellanox Technologies MT27500/MT27520 Family [ConnectX-3/ConnectX-3 Pro Virtual Function]
I used the MLNX-NATIVE-ESX-ConnectX-3_3.16.11.10-10EM-650.0.0.4598673-offline_bundle-12539849.zip but it fails on 6.5 and 6.7. The builtin driver in 6.7U3 isn't recognized, too. It's a study work / homelab setup. ESXi installation stops with no network adapters were detected.