Apple iMac 21.5" A1311 Series 820-3126-A Intel All-In-One Logic Motherboard. Apple meets the current and future demands of high performance, power embedded computing, making it ideal for communications, transaction terminal, interactive client, industrial automation applications as well as for standard home use.

Apple Part Number: 820-3126-A
Compatible Part Numbers: 661-5936 661-5937 639-31216 31PIMMB00Y0
Compatible Models: Apple iMac 21.5" A1311 MC309LL/A Mid 2011 Series

Please Note: This motherboard does NOT come with a CPU.