New amd radeon hd6970m for iMac 27" 2011 a1312 HD 6970m Graphics Card GPU 2gb | eBay
How to Upgrade/Replace GPU Graphics Card on Mid-2011 21.5" iMac - YouTube
Apple Initiates Video Card Replacement Program for Radeon HD 6970M Equipped Mid-2011 27” iMacs
Need to repair this iMac 27" 2011, Please any suggestions? GPU Temperature is not even 50 C : r/mac
iMac Intel 21.5" EMC 2428 Radeon HD 6750M Graphics Card - iFixit Store
iMac Intel 27" EMC 2374, AMD Radeon HD 4850 Video Card Removal & Repair - iFixit Repair Guide
Amazon.com: 2GB Graphics Video Card Upgrade for Apple iMac Mid-2011 27 Inch Core i5 MC814LL/A MC814 A1312 Desktop All-in-One PC, AMD Mobility Radeon HD 6970M Replacement Repair Parts : Electronics
New Nvidia Gtx 880m Gtx880m 8gb Gddr5 Mxm 3.0b Video Card Flashed Vbios For Imac 27-inch Mid 2011 Graphics Upgrade - Laptop Repair Components - AliExpress