Intel Desktop Board 21 B6 E1 E2 Lan Driver Upd Download

printed on a small barcode label on the board itself. It usually looks like GXXXXX-XXX Method A (Physical):

Note: Intel discontinued Desktop Boards in 2013. No new drivers will ever be released for these chips. If you are on Windows 11 24H2 or later, consider buying a $15 PCIe Gigabit card with a Realtek chip—it will save you hours of INF editing. intel desktop board 21 b6 e1 e2 lan driver download