This XM-NA3821 Dual Gigabit Ethernet PCI-Express Card is a high performance 10/100/1000 BASE-T Ethernet LAN controller which designed by Intel 82575EB chipset. It provides a low cost solution for connecting to a high speed Local Area Network with a data transfer rate up to 1000Mbps over a group of 4 twisted pair copper wires to a distance of maximum 100 meters, and yet 100% fully backward compatible with 10/100BASE-T system. Low profile and full height brackets are both provided, suitable for all PCs