Intel Ethernet Server Adapter I340-T4 1Gbps RJ-45 Copper, PCI Express 2.0 x 4 Lane, OEM packaging INTEL CORP. E1G44HTBLK BULK ETHERNET I340 SERVER ADAPTER PCI Express 2.0 (5 GT/s) bus type; 4-lane PCI Express bus size (operable in x4, x8 and x16 slot) Intel 82580 controller, RJ-45 connector, over copper cabling