Upgrading the graphics in our 2011 iMac (first attempt) - YouTube
Today picked up a $20 2011 iMac 27” with working gpu too! : r/mac
Amazon.com: Valley Of The Sun 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 :
Upgrading an iMac GPU for METAL Support! Late 2009 – Mid 2011 Models - YouTube
iMac mid 2011 GPU upgrade | MacRumors Forums
SOLVED: What GPU's are compatible with iMac 27" 2011? - iMac Intel 27" EMC 2429 - iFixit
For iMac 27" A1312 Mid 2009 2010 2011 upgrade NVIDIA GTX 880M 8GB Video Card | eBay
Apple Initiates Video Card Replacement Program for Radeon HD 6970M Equipped Mid-2011 27” iMacs
HoTecHon Modded Big 3 Pipe GPU Heatsink for iMac 27" Mid 2010 / 2011 Graphics Upgrade
Upgrading the GPU in the 2011 iMac - is it worth it? - YouTube
2011 iMac 27″ K1100M Graphics Card Swap And Install Catalina
Shop Imac 2011 Gpu | UP TO 51% OFF
2011 iMac CPU Upgrade - will a Xeon work? Also how about a k2100m at the same time! - YouTube
How to Upgrade/Replace GPU Graphics Card on Mid-2011 21.5" iMac - YouTube