We're using Proxmox Virtual Environment version 5.4-3 and have upgraded our cluster to Mellanox Connectx-3 40G NICs. We would like to use the Mellanox drivers if possible, but their download page only provides drivers for Debian up to version 9.5 and I believe PVE 5.4-3 runs on top of Debian 9.8. How are others getting around this issue? We only seem to be able to achieve 20 GBPS (iperf3) using the included open source drivers. The NICs are connected to Arista 7050 series 40G switches so I was hoping for wire speed. I don't know if this is a driver related issue or something else, but drivers seemed like a good place to start.