This PCIe Gigabit Network card is single, compact, low power components that offer a fully-integrated Gigabit Ethernet Media Access Control and physical layer port It is used of high-performance chip NH82573L,and it is uses the PCI Express architecture and provides a single-Port implementation in a relatively small area so it can be used for server and any other personal computers Fully compliant with PCI-Express Base Specification Revision1.1 Single-(x1)PCI-Express with throughput up to 2.5Gbps Fully Plug and Play compatible Full-duplex operation at 10/100/1000Mb/s Half-duplex operation at 10/100Mb/s 10/100/1000 data rate auto negotiation operation Fully compliant with IEEE802.3,802.3u,802. Support full duplex flow control(IEEE802.3x) Supports IEEE802.1P Layer 2 Priority Encoding Supports IEEE802.1Q VLAN tagging IPv4 and IPv6 checksum offload support Receive Side Scaling(RSS) with two hardware receive queues Supports jumbo frame to 9k bytes Crossover detection and Auto correction operation System Requirements FreeBSD, Linux, ESXi,XP,Vista,8,8.1,and 10 32/64bit server 2003/Server2008 R2/Server2012 R2 One available PCIe x1/x4/x8/x16 slot Colour:As Shown Material:PCB Package Contents: 1x Network Card 1x CD 1x Low Profile Bracket 1x 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.