1. PCIe base specifiatication 2.0(2.5GT/S) or (5GT/s). Complies with quad port 1GbE PHY device. (Copper) standrd IEEE802.3 Ethernet interface for 1000BASE-T,100BASE-TX,and10BASE-T application(802.3,802.3u,and 802.) 2. PCI Bus Power Management interface Specification Rev1.2. Max 9.6KB of jumbo frames supported. Flow control supports: send/receive PAUSE frames and receive thresholds 3. Statistics for management and RMON. 802.1Q VLAN support. 64-bit address support for systems using more than 4GB of physical memory 4. IPv6 wake-up filters. segmentation offload :up to 256KB. IPv6 support for IP/ and IP/UDP receive checksum offload. Interrupt throttling control to limit maximum interrupt rate and improve CPU usage. Receive packet split header. support 5. Suport for Virtual Machines device queues. Supports OS: Linux,FreeBSD/Server2003/Win7/Win8/Win8.1/Server2012/Server2016/Win10 32/64bi Kind: Internal Type: Wired Lan Transmission Rate: 1000M Ethernet Application: Server Adapter Socket: RJ45 Interface Type: PCI Express Applicable Network Type: Gigabit Ethernet Chipset: Intel82576 Interface: PCIE X1 colour:Photo color Material:ABS size:12 x 6 x 1cm Package Contents: 2 x Gigabit network card 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.