The STARTECH ST1000SPEX4 is a 4-Port PCI Express Gigabit Ethernet Network Adapter Card that adds four 10/100/1000 Mbps Gigabit network interfaces to a desktop PC or server. This card is compatible with IEEE 802.3/u/ab standards and supports maximum data transfer speeds of up to 1000 Mbps in each direction, for a total of 2000 Mbps.