Specification: Compliant with PCIE Express Revision 3.0 and downstream with PCI Express Reivison2.0 Supports line rate of 8.0GT/s and 5.0GT/s per Supports Gen 3x4 or Gen 2x4 Supports communication and management function Integrated Aquantia AQrate PHY featuring NBASE-T technology Color: As Shown Material: plastic+metal Supports PHY specifications with 10GBASE-T/5GBASE-T/2.5GBASE-T/1000BASE-T /100BASE-T. On-chip high resolution cable analyzer for advanced cable diagnostics Energy Efficient Ethernet(EEE) Support Supports IEEE1588v2 Precision Time Protocol Support send offload, Receive Side Scaling(RSS),Direct Cache Access() and Header checksum for increased network performance and lower host CPU utilization Supports IPv4,IPv6 and IPv6/UDP checksum offload Supports Jumbo frame(up to 16kbytes) Quality of Service() Supports up to eight traffic classes and Data Center Bridging() Support Operation Systems: WinddowsWin7/Win8/Win8.1/Win10/ Server2012 / Server2016/ Linux/ OS System Requirements lFreeBSD, Linux , ESXi, Win7/ Win-server2012/ Win-server2008/ Win8/Win8.1/Win-server2016/win10/ OS One available PCI Express x4 slot Package Contents: 1 x server network card 1 x CD driver 1 x short bracket 1 x English Manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.