If you cannot find the model name, go to Device Manager , right-click the "Ethernet Controller" (which likely has a yellow exclamation mark), select Properties > Details , and choose Hardware IDs . Copy the VEN_XXXX&DEV_XXXX code into a search engine to identify the exact manufacturer and driver needed. Step 3: Where to Download Drivers
Most Foxconn boards from this era (LGA 775 socket) use one of three LAN controllers: Common on G31 chipset boards.
Look for a printed model name on the motherboard's surface, often located between the PCI slots or near the CPU socket.