The d link dge 528t is a high performance 101001000mbps copper gigabit pci card for desktop pc capable of running at full duplex gigabit speed this card gives your pc 2000mbps data transmission on your existing cat 5 twisted pair network cable as an inexpensive alternative solution to fiber optic the card allows you to instantly upgrade to gigabit without requiring you to install new expensive fiber cables the card supports 101001000mbps network speed auto sensing and fullhalf duplex