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
Today picked up a $20 2011 iMac 27” with working gpu too! : r/mac
iMac 2009 to 2011 (A1311/A1312) Upgrade Guide – MacintoshMen
iMac Intel 27" EMC 2374, AMD Radeon HD 4850 Video Card Removal & Repair - iFixit Repair Guide
Amazon.com: 2GB Graphics Card GPU Upgrade Replacement for iMac 27 Inch Mid- 2011 A1312 Desktop Computer Core i5 3.1 MC814LL/A MC814, AMD Radeon HD 6970M GDDR5 2 GB MXM Video Board Repair Parts :
Amazon.com: 2GB Graphics Video Card Replacement for Apple iMac Mid-2011 27 Inch A1312 Core i7 3.4 MD063LL/A MD063 Desktop PC Computer, ATI Radeon HD 6970 GDDR5 2 GB, New GPU Upgrade Repair
iMac 27" mid-2011 GPU upgrade
Upgrading an iMac GPU for METAL Support! Late 2009 – Mid 2011 Models - YouTube
SOLVED: What GPU's are compatible with iMac 27" 2011? - iMac Intel 27" EMC 2429 - iFixit
2GB Graphics Video Card HD6970M Replacement, for iMac Mid-2011 27 Inch A1312 Desktop PC Computer Core i5 MAC814LL/A MC814, AMD Mobility Radeon HD 6970M GPU Upgrade MXM Board Repair Parts
How to Upgrade/Replace GPU Graphics Card on Mid-2011 21.5" iMac - YouTube
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
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
Upgrading the graphics in our 2011 iMac (first attempt) - YouTube