Original Graphics Video Card Replacement for Apple iMac Core i3 3.2 Mid-2010 21.5 Inch Desktop Computer A1311 MC509LL/A MC509, AMD ATI Radeon HD 5670 GDDR3 512MB, GPU Board Repair Parts : Electronics
Amazon.com: Original Graphics Video Card GPU Upgrade Replacement for Apple iMac 21.5 Inch Late 2011 Core i3 3.1 All-in-One Desktop PC MC978LL/A, AMD ATI Mobility Radeon HD 6750M, MXM VGA Board Repair
Buy 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
How to upgrade a Mac: Swap in new RAM, graphics card, hard drive and more | Macworld
Possible GPU problem - iMac 21.5 mid 2010 - Apple Community
Nvidia Quadro K1100m Gddr5 2gb Mxm Video Card Flashed Vbios For Imac 21.5" / 27" Late 2009 To Mid 2011 Upgrade - Laptop Repair Components - AliExpress
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 Board Repair Parts : Electronics
Apple iMac (summer 2010) review: Apple iMac (summer 2010) - CNET