TP-Link Gigabit Network Expansion Card - This Gigabit Ethernet controller card from TP-Link lets you add 1000Mbps LAN capability to your desktop PC system. With the onboard LED indicator lights, you'll be able to see your network activity, and compatibility with a wide variety of operating systems ensures that you'll get super speed networking no matter what OS you run. PCIe Network Adapter. 10/100/1000Mbps PCIe Adapter. Realtek RTL8168B chipset. 10/100/1000Mbps Auto-Negotiation RJ45 port. Auto MDI/MDIX. 32-bit PCIe interface, saving the finite chassis space. Wake-on-LAN, convenient to manage over LAN.