Intel iMac 24" NVIDIA GeForce 8800GS 512MB Video Card, Early 2008 DIY Parts replacement Video Cards
Upgrade 24” iMac video card - ATI Radeon 256MB to NVIDIA GeForce 512MB - Ask Different
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 Graphics Card GPU Overheating and Failure
SOLVED: What GPU's are compatible with iMac 27" 2011? - iMac Intel 27" EMC 2429 - iFixit
iMac Intel 27" EMC 2374, AMD Radeon HD 4850 Video Card Removal & Repair - iFixit Repair Guide
Apple iMac Graphics Card Repair, Replace Chipset (not BGA Reballing or Reflow) | eBay
iMac Intel 27" EMC 2374, AMD Radeon HD 4850 Video Card Removal & Repair - iFixit Repair Guide
late 2014 iMac 5k with 8GB of Ram graphic… - Apple Community
Apple opens graphics card replacement program for some mid-2011 iMacs - 9to5Mac
Original For Imac 21'' A1311 27" A1312 Radeon Hd6770m Hd6770 216-0810001 Graphic Card Vga Video Card Gpu - Laptop Repair Components - AliExpress
2010 iMac GPU Upgrade to NVIDIA GTX 765M - YouTube
How to Upgrade/Replace GPU Graphics Card on Mid-2011 21.5" iMac - YouTube