(some documentation suggests a limit of 8 GB depending on the specific AA revision) of DDR3 1600/1333/1066 MHz non-ECC memory. Expansion & Graphics PCI Express 3.0 x16 slot for dedicated GPUs. Dual display support via integrated VGA and DVI-D ports (requires a processor with Intel HD Graphics). Connectivity 10 x USB 2.0 ports (6 rear, 4 internal headers). 4 x SATA 3.0 Gb/s ports. Gigabit Ethernet (10/100/1000 Mbps). The Retro Web Important Resources & Drivers Official Product Guide
The identifier 21 B6 E1 E2 (often seen as /21-B6-E1-E2 ) is not a model number but a regulatory or specification marking found on several older Intel desktop boards, most commonly associated with the Intel Desktop Board DH61CR intel desktop board 21 b6 e1 e2 specification link
: This is a small barcode sticker placed on the board. It features a 6-digit number followed by a 3-digit number (e.g., AA E12345-123 ). This is the most accurate fingerprint for an Intel desktop board. (some documentation suggests a limit of 8 GB
: Most commonly LGA 1155 (supporting 2nd and 3rd Gen Intel Core processors) or LGA 1150 (supporting 4th Gen). Connectivity 10 x USB 2
Based on the E210882 information document and user reports , boards bearing this mark are often manufactured with:
If the board fails to POST, check for BIOS version compatibility, especially when using 3rd Gen Intel CPUs on older 2nd Gen boards.