iMac 2009 / 2010 / 2011 GPU upgrade β Fixing LED/LCD PWM brightness with an ESP32 | by Fixing Things | Medium
Macbook Pro 2011 17" GPU repair - Real Mac Mods
A1312 iMac GPU Replacement - YouTube
iMac Graphics Issue β Expert Mac Repair Lewisville
Reflow on HD6750M graphics card | MacRumors Forums
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 :
Newest iMacs have removable GPU, ambient light sensor | Ars Technica
Amazon.com: Valley Of The Sun 100% Genuine 2GB Graphics Video Card for Apple iMac Mid-2011 27 Inch Core i5 MAC814LL/A A1312 Desktop All-in-One PC, AMD Radeon HD 6970M 2 GB GDDR5 109-C29657-10