Warning! Pay attention, in my experience using FPT you will wipe your Intel NIC MAC address. I suggest to you to write on a sheet your MAC address before to flash bios with FPT.
After flashing BIOS with FPT you can verify if MAC address is 88-88-88-88-87-88. In this case your MAC was overwritten with a generic one and you need to recovery the original one. You can do that using an HEX editor to edit the BIOS and find and replace 88 88 88 88 87 88 with your real MAC address.