820-2507-A 661-5317 Core 2 Duo, 27 inch 3.33GHz, iMac A1312, Late 2009 Logic Board NB-2822W
Apple part number: 661-5317, 820-2507-A, Compatible models: A1312-Late 2009-MB952LL, A1312-Late 2009-MB953LL, A1312-Late 2009-MB953LLCTO, 820-2507-A, Compatible Mac info. : 27-inch 3.06GHz iMac , 27-inch 2.66GHz i5 iMac , 27-inch 2.8GHz i7 iMac, 820-2507-A, 661-5317 Core 2 Duo, 27 inch 3.33GHz, iMac A1312, Late 2009 Logic Board 8202507A
Apple part number: 661-5317, 820-2507-A
Compatible models: A1312-Late 2009-MB952LL, A1312-Late 2009-MB953LL, A1312-Late 2009-MB953LLCTO, 820-2507-A
Compatible Mac info. : 27-inch 3.06GHz iMac , 27-inch 2.66GHz i5 iMac , 27-inch 2.8GHz i7 iMac, 820-2507-A
661-5317 Core 2 Duo, 27 inch 3.33GHz, iMac A1312, Late 2009 Logic Board 8202507A