2011 iMac Graphics Card Upgrade | How to | Mac Expert Guide
iMac Intel 27" EMC 2374, AMD Radeon HD 4850 Video Card Removal & Repair - iFixit Repair Guide
Apple iMac 27" with a failed Graphics card is getting surgery today... - Jappel Tech - Home Theater, Savant, URC, Lutron Shades, Audio Video, Tech Support, Managed Services
iMac mid 2011 GPU upgrade | MacRumors Forums
How to Upgrade/Replace GPU Graphics Card on Mid-2011 21.5" iMac - YouTube
For iMac 27" A1312 Mid 2009 2010 2011 6970m 1GB 2GB 109-C29657-10 Upgrade For Nvidia GTX 765M DDR5 2GB MXM TYPE-B VIDEO GPU CARD - Newegg.com
iMac 2009 to 2011 (A1311/A1312) Upgrade Guide – MacintoshMen
Apple Initiates Video Card Replacement Program for Radeon HD 6970M Equipped Mid-2011 27” iMacs
iMac 2009 / 2010 / 2011 GPU upgrade — Fixing LED/LCD PWM brightness with an ESP32 | by Fixing Things | Medium
2 GB Graphics Video Card GPU Upgrade Replacement for Apple iMac Mid-2011 A1312 27 Inch Core i7 3.4 i5 3.1 Desktop Computer, New AMD Radeon HD 6970M HD6970M 2GB MXM Board Repair Parts