nVIDIA Quadro K4000m 4GB Metal MXM Video Card for iMac 11,1 / 11,3 / 12,2 A1312 | eBay
Amazon.com: Valley Of The Sun Graphics Video Card GPU Replacement for Apple iMac Mid-2010 A1311 Core i3 3.06 MC508LL/A MC508 21.5 Inch Desktop Computer, ATI Radeon HD 4670 GDDR3 256MB, MXM VGA
Apple iMac 21.5" 2010 ATI HD 4670 256MB GDDR3 GPU Screws Brackets & Airport Card | eBay
Late 2009 iMac 27" Video Card Repair [4850 Bake] - YouTube
Nvidia Quadro K3100m 4gb Gddr5 Mxm3.0b Metal Gpu Video Card Flashed Vbios For Imac A1312 27-inch Mid 2010 / 2011 Upgrade - Laptop Repair Components - AliExpress
Amazon.com: Valley Of The Sun Genuine Graphics Video Card Replacement for Apple iMac Mid-2010 Core i5 A1312 27-Inch MC511LL/A MC511 Desktop PC, ATI Mobility Radeon HD 5750 GDDR5 1GB MXM VGA Board