I have ESX 6.0 with single on-board NIC that works fine. I needed a second NIC for additional testing. Found a cheap D-link DFE-520TX in the nearby store. It is a PCI 10/100 Fast Ethernet Single NIC card.
Once you have downloaded your new driver, you'll need to install it. In Windows, use a built-in utility called Device Manager, which allows you to see all of the devices recognized by your system, and the drivers associated with them. 2b1af7f3a8