​Features:Brand New & High Quality.Compliant with PCI Express Specification Revision 1.1.Support 1-Lane (x1) PCI Express throughput supports rate of 2.5 Gb/s.Support 1000BASE-T, 100BASE-TX, and 10BASE-T.Compatible with IEEE 802.3, 802.3x, 802.3u, 802.1Q.Automatic speed negotiation and smart speed shift down.Support address filtering for unicast, multicast and broadcast.Interrupt coalescing support.Ipv4, TCP, UDP CheckSum offload support.TCP large packet segmentation support.Hardware: PCI Express-enabled system with an available PCI Express slot.OS support: Windows 2000, 2003 Server, XP 32/64-bit, Vista 32/64-bit, 7.Package Included:1 x PCI-E Gigabit Ethernet CardNO Retail Box. Packed Safely in Bubble Bag.