820-2494-A 661-5307 MXM, Logic Board - iMac Late 2009 A1311, 21.5 inch 3.06GHz NB-3127W
This is a replacement 3.06GHz logic board for the 21.5" iMac.
EEE code: BZT
Apple part number: 661-5307, 820-2494-A
Compatible models: A1311-Late 2009-MB950LL-MC413LL, 820-2494-A
Compatible Mac info. : 21.5-inch 3.06GHz iMac, 820-2494-A
661-5307 Board MXM, Logic - iMac Late 2009 A1311, 21.5 inch 3.06GHz, 8202494A