The 4-Port 10/100/1000 Base-TX PCI-X adapter is a 64-bit Ethernet card. It is a full height PCI-X 1.0a adapter which supports four gigabit ports on a single adapter delivering increased bandwidth for PCI-X slot-constrained systems. It provides high connectivity and reliability using two integrated, dual-port gigabit Ethernet controllers and a PCI-X bridge chip. The adapter connects the system to an Ethernet LAN at speeds of 10, 100, or 1000 Mbps.