TARJETA LÓGICA LGA 1155 - Apple iMac 21,5" A1311 mediados de 2011 820-2641-A
Watch out! There's also an iMac with model A1311 and Late 2011 release, which has a logic board that isnot compatible with this board. iMac 21.5" A1311. iMac 21.5". Socket Type: LGA 1155 (Socket H2).