Koutech Gigabit Ethernet 10/100/1000 PCI Express Card (Realtek Chipset) One (1) Gigabit Ethernet Network port Fully compliant with one-lane 2.5Gbit/sec PCI Express specifications (PCIe x1 slot) Compliant with 10/100/1000 IEEE 802.3 specifications Supports Windows 2000/XP/Server 2003/Vista/Server 2008/Windows 7/Windows 8 or later Supports Linux