How do I add a high-speed Gigabit Ethernet port to a desktop computer motherboard? The TP-Link TG-3468 is a dedicated 32-bit Gigabit PCIe network interface card (NIC) designed to deliver blazing-fast wired internet to standard desktop PCs. By plugging directly into a PCI Express slot, this network card optimizes local area network speeds for enterprise workstations, home servers, and network-attached storage (NAS) systems.