Gigabit Ethernet Adapter 32 bit PCI Bus Compliant with IEEE802.3 10BASE-T, IEEE 802.3u 100BASE-TX, IEEE 802.3ab 1000BASE-T standards 1 RJ-45 connector with auto-uplink Support PCI V2.2, 32-bit, 33/66 Mhz Auto-Negotiation determines the transmission speed at 10/100/1000 Mbps and full/half duplex speed Optimized for multi-tasking with today's large files and demanding applications Support Windows 98SE, NT4.0, 2000, XP, ME, Netware 4/5/6.X, and Linux driver Chipset RTL8139