Sun Microsystems has long been synonymous with leading edge technology. Now, after years of telling the world "The Network is the Computer", Sun is poised to become the leader in the emerging network-driven economy. Forward thinking organizations are looking to Sun to lead them into the dot com future. And Sun takes its leadership commitment seriously.The X5544A is a Sun base board product with a 133 MHz PCI-X, 10 Gigabit Ethernet fiber. Board requires MMF or SMF transceiver: X5558A or third party.