820-2507-A 661-5319 Logic Board - Late 2009 A1312 27 inch 3.06GHz Core 2 Duo iMac NB-2823W
This is the 3.06 GHz Core 2 Duo Logic Board for the 27" iMac.
EEE code: BZR
Apple part number: 661-5319, 820-2507-A
Compatible models: A1312-Late 2009-MB952LL, 820-2507-A
Compatible Mac info. : 27-inch 3.06GHz iMac, 820-2507-A
661-5319 Board, Logic - Late 2009 A1312 27 inch 3.06GHz Core 2 Duo iMac 8202507A