AMD Radeon HD 6970M HD6970M 2GB DDR5 MXM Graphics Video Card for Apple iMac 2011 | eBay
iMac 27' (mid 2011) fix for AMD Radeon HD 6970M no video problem - YouTube
Amazon.com: New 2 GB GDDR5 Graphics Video Card Replacement for Apple iMac A1312 Mid-2011 Core i7 3.4 MD063LL/A 27-Inch Desktop PC Computer AMD Radeon HD 6970M 2GB MXM VGA Board Upgrade Repair
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 :
661-5969 Video Card AMD Radeon HD 6970M 2GB for iMac 27" Mid 2011 A1312 | eBay
Amazon.com: Valley Of The Sun Genuine Graphics Card GPU Replacement for AMD Radeon HD 6970M GDDR5 1GB 109-C29657-10 for Apple iMac 2011 27" MC814LL/A MD063LL/A A1312 Desktop PC Computer, MXM Video Board :
iMac Intel 27" EMC 2429 Radeon HD 6970M Graphics Card
Apple Initiates Video Card Replacement Program for Radeon HD 6970M Equipped Mid-2011 27” iMacs