The marking "21 B6 E1 E2" refers to regulatory information on Intel Desktop Boards, typically featuring an LGA 1155 socket for 2nd Gen Core processors. Users must identify their specific board model via the AA number on a small barcode label to find the correct technical specifications. For more details, visit Intel .

The Intel Desktop Board covered in this manual targets legacy value or business desktop systems. It supports (depending on specific chipset: 915G/945G/946GZ/GL). The codes “21 B6 E1 E2” often appear on PCB silkscreen or BIOS labels for factory identification.