iMac 2009 to 2011 (A1311/A1312) Upgrade Guide – MacintoshMen
Someone gave me this unwanted Mac, anyone know if you can upgrade the graphics cards on these ? Keep seeing conflicting information it's a 24" early 2009 imac : r/mac
Apple opens graphics card replacement program for some mid-2011 iMacs - 9to5Mac
5 Things to Know Before Upgrading Your 2009 or Later iMac
Amazon.com: Original Graphics Card GPU Replacement, for Apple iMac Late 2009 A1312 MC507LL/A 27-Inch Core i7 2.8 27-Inch Computer, AMD Radeon HD4850 HD 4850 GDDR3 512MB, MXM GPU Video Board Repair Parts :
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 :
Can I replace/upgrade 4850 graphic card in 2009 iMac - iMac Intel 27" EMC 2309 and 2374 - iFixit