Nvidia Quadro K1000m 2gb Mxm Video Card Preflashed Vbios For Imac 21.5" / 27" Late 2009 To Mid 2011 Upgrade - Laptop Repair Components - AliExpress
Amazon.com: 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 :
iMac Intel 21.5" EMC 2389 Radeon HD 4670 Graphics Card
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
Graphics Card, Radeon HD - iMac 21.5″ A1311 (Mid 2010)
How to Upgrade/Replace GPU Graphics Card on Mid-2011 21.5" iMac - YouTube
Bought a mid 2010 iMac at goodwill for 15$. It works technically.... : r/mac
Amazon.com: 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