Odyson - Power Supply (310W) Replacement for iMac 27" A1312 (Late 2009-Mid 2011) Power Supply 310W 27" A1312 (Late 2009 - Mid 2011) 310W Power Supply compatible with all A1312 iMac 27" computers Compatibility: iMac10,1 Late 2009, iMac11,1 Late 2009, iMac11,3 Mid 2010, iMac12,2 Mid 2011 APN: 661-5310, 661-5468, 661-5972 Printed Part #: 614-0446, 614-0476, 614-0501, ADP-310AF B, PA-2311-02A