SMC Networks SMC9452TX EZ Card 1000 Copper PCI Card (10/100/1000 Mbps) Ideal solution for high performance workstations Gigabit Ethernet is 10 times faster than Fast Ethernet Offers 10 Mbps, 100 Mbps and 1000 Mbps Features TCP and UDP Checksum, Flow Control, and Jumbo Frame support Complies with 802.3ab 1000Base-T, 802.3u 100Base-TX Standards