We are using ESXI 5.5. I installed driver for this NIC: Intel® Ethernet Server Adapter I340-T4.
(we used vSphere PowerCLI to install these driver files: igb-3.2.10-504656.zip, igb-184.108.40.206-1242301.zip, igb-5.2.5-1682588.zip by the way: input command line Example: Add-EsxSoftwareDepot D:\igb-3.2.10-504656.zip)
But after restart ESXI, still cannot see this NIC.
Mainboard: Gigabyte GA-H67MA-USB3-B3.
The igb driver is prone to experience an issue related to NVM checksum. Check /var/log/vmkernel.log for messages containing:
igb 0000:0a:00.0: The NVM Checksum Is Not Valid
If the NVM issue exists, you might look here for information on using a manufacturer utility to fix the NVM issue: