This PCIe RTL8111 eight Gigabit Ethernet controller card is a high performance 10/100/1000 BASE-T Ethernet LAN controller, interface for host communications with power management, and is compliant with the IEEE 802.3u specification for 10/100Mbps Ethernet and the IEEE 802.3ab specification for 1000Mbps Ethernet. It also supports an auxiliary power auto-detect function, and will auto-configure related bits of the PCI power management registers in PCI configuration space, and is perfectly to convert the PCI-Express interface into Eight Gigabit Ethernet ports. Integrated 10/100/1000M transceiver Supports Giga Lite (500M) mode Auto-Negotiation with Next Page capability Supports PCI Express 1.1 Supports pair swap/polarity/skew correction Crossover Detection & Auto-Correction Supports hardware ECC (Error Correction Code) function Supports hardware CRC (Cyclic Redundancy Check) function Transmit/Receive on-chip buffer support Supports PCI MSI (Message Signaled Interrupt) and MSI-X Fully compliant with IEEE802.3, 802.3u and 802.3ab Supports IEEE 802.1P layer 2 Priority Encoding Supports 802.1Q VLAN tagging Supports IEEE 802.3az-2010(EEE) Supports Full Duplex flow control (IEEE.802.3x) Supports jumbo frame to 9K bytes Supports quad core Receive-Side Scaling(RSS) Supports Protocol Offload(ARP&NS) Supports ECMA-393 ProxZzzy Standard for sleeping hosts System Requirement: for Windows for Linux for MAC OS 10.7 or above Colour:Black Material:ABS Package Contents: 1x 8-port Gigabit LAN 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.