Amazon.com: GDDR5 2GB Graphics Video Card Radeon HD 6970M for Apple iMac Mid-2011 27 Inch Core i5 i7 All-in-One Desktop PC Computer, AMD Radeon HD6970M HD6970 MXM Board GPU Upgrade Repair Parts :
Apple A1312 2011 iMac 27" 3.4GHz Core i7 16GB RAM 1TB HDD os10.13 Rade
Apple Initiates Video Card Replacement Program for Radeon HD 6970M Equipped Mid-2011 27” iMacs
NEW Apple iMac 27" A1312 mid 2011 AMD Radeon HD 6970M 2GB DDR5 VGA Video Card | eBay
Original Ati HD 6970m 5750 4850 4670 Video Card 1GB 2GB 109-C29657-10 For iMac 27" A1312 Graphics Card GPU 2009 2010 2011 Year
New amd radeon hd6970m for iMac 27" 2011 a1312 HD 6970m Graphics Card GPU 2gb | eBay