Apple iMac 27" A1312 Mid 2011 Radeon HD 6970M 1GB Graphics Card 631-1721 | eBay
iMac 2009 / 2010 / 2011 GPU upgrade — Fixing LED/LCD PWM brightness with an ESP32 | by Fixing Things | Medium
Upgrading the graphics in our 2011 iMac (first attempt) - YouTube
Need to repair this iMac 27" 2011, Please any suggestions? GPU Temperature is not even 50 C : r/mac
Amazon.com: Valley Of The Sun New 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 :
Original Ati HD 6970M 5750m 4850 4670 Graphics Card Video Card 1GB 2GB 109-C29657-10 For Apple iMac 27" A1312 GPU 2009 2010 2011 - AliExpress
Apple iMac 27" Mid 2011 Video Card - ATI Radeon 6970 with 2 GB GDDR5 m - Part Haven