Based on retail listings for boards with this specific marking (e.g., as seen on eBay and community discussions), the specifications typically include: LGA 1155/Socket H2 .
Because this is a marking and not a model name, specifications can vary slightly depending on the exact board model (such as the or DB75EN ) it is stamped on. Common Specifications for Boards with this Marking Socket Type: LGA 1155 (Socket H2) . intel desktop board 21 b6 e1 e2 specification link
2nd and 3rd Generation Intel Core i3, i5, and i7 processors (e.g., i5-2300 or i7-2600 ). Based on retail listings for boards with this