D-Link Gigabit PCI-Express x4 1000BaseSX (LC) Adapter . Connectivity technology: Wired, Host interface: PCI-E. Data transfer rate (max): 2000 Mbit/s, Data transfer rate: 2 Gbit/s, Bandwidth: 2.5 GHz. Maximum operating distance: 550 m. Compatible operating systems: -Windows 2000/2000 Server. -Windows 2003 Server/2003 Server x64 edition. -Windows XP/XP x64. , Networking features: Ethernet/Fast Ethernet