The Realtek PCIe FE Family Controller is a network interface card (NIC) used for Ethernet (wired) connectivity on a computer. It is typically integrated into many desktop motherboards and laptops to provide a fast and reliable network connection using the PCIe (Peripheral Component Interconnect Express) interface.

The "FE" in PCIe FE stands for Fast Ethernet, which typically supports speeds up to 100 Mbps, though newer versions may support higher speeds (such as Gigabit Ethernet, which supports up to 1000 Mbps). The Realtek PCIe FE Family Controller is commonly used for Ethernet wired network connections.

To use this controller with your Windows computer, you need the appropriate driver, which allows Windows to communicate with the hardware, manage network connections, and troubleshoot network issues.