820-3126-A 661-5937 Board, Quad-Core i7, Logic, 2.8 GHz, - 21.5 inch Mid 2011 - A1311 iMac NB-3133W
This is a replacement 2.8GHz logic board for the 21.5" iMac released in Mid 2011.
EEE code: DKG2,DM67,DNJL
Apple part number: 661-5937, 820-3126-A
661-5937, 820-3126-A Board, Quad-Core i7, Logic, 2.8 GHz, - 21.5 inch Mid 2011 - A1311 iMac 8203126A