This PCI-Express dual Gigabit Ethernet controller card is a high performance 10/100/1000 BASE-T Ethernet LAN controller, and is perfectly to convert the PCI-Express interface into two Gigabit Ethernet ports. Chipset : Realtek Features: Two Gigabit Ethernet ports (RJ45 x 2) Complies with PCI-Express Revision 1.1 A high performance 1000BASE-T Ethernet controller card Backward compatible to 10/100BASE-T networking 10/100/1000Mbps data rate auto negotiation operation Compatible to existing CAT-5 UTP cabling Fully compliant with IEEE 802.3, 802.3u and 802.3ab Supports full duplex flow control (IEEE 802.3x) Supports IEEE 802.1P layer 2 Priority Encoding Supports IEEE 802.1Q VLAN tagging Crossover Detection and Auto Correction operation Supports WOL (Wake-On-LAN) function Supports both Standard-Profile and Low-Profile computer chassis (optional item Low Profile Bracket is not included, but can be purchased separately) Support Windows 8 32-/64-bit, Windows 7 32-/64-bit, Windows Server 2008 32-/64-bit, Windows Vista 32-/64-bit, Windows Server 2003 32-/64-bit, Windows XP 32-/64-bit, Windows 2000, ME, 98SE, Linux, MAC OS and DOS Package Content: 1 x PCIe Dual Gigabit LAN Ethernet Controller Card 1 x User Manual 1 x Driver CD (Note : Photo attached is for reference only, it may be slightly varied in items of colour, shape from the actual item delivered from time to time)