The IBM Intel 5740 03N5444 Gigabit Base-TX PCI-X 4-Port Ethernet Adapter is a high-speed lan card designed for computers with PCI-X ports. It is capable of providing a maximum data rate of 1 Gbps and features 4 Ethernet ports for multiple connections. Manufactured by Intel, this adapter is compatible with PCI-X ports and is ideal for boosting the networking capabilities of computers in a variety of settings. With no manufacturer warranty but reliable performance, this Ethernet adapter is a reliable choice for businesses and personal use alike.