This message was posted on behalf of Intel Corporation
Thank you for posting in Wired Ethernet Communities. The retail Intel® Ethernet Converged Network Adapter X520 series (using Ethernet controller 82599) do not have updatable firmware, the driver does not load the firmware. In case you are using an OEM version, you may try contacting the OEM NIC vendor to check with them, they might have the firmware for the OEM version. Thanks.
Intel Customer Support
Agent under contract to Intel