iMac 24″ (Alu) A1225 Early 2009 Video / Graphics Card – Apple Rescue of Denver
Graphics Card (Radeon HD 4670, 256MB)
Amazon.com: Original Graphics Card GPU Replacement for Apple iMac 2009 Core 2 Duo 3.06 A1312 MB952LL/A 27 Inch Desktop PC Computer, ATI Mobility HD 4670 GDDR3 256MB 109-B80357-00, MXM Video Board Repair Parts : Electronics
GPU ATI 216-0732019 Graphic Video IC Chip for iMac 27" A1312 - Late 2009 (EMC 2309)