Today picked up a $20 2011 iMac 27” with working gpu too! : r/mac
For iMac 27" A1312 Mid 2009 2010 2011 6970m 1GB 2GB 109-C29657-10 Upgrade For Nvidia GTX 860M DDR5 2GB MXM TYPE-B VIDEO GPU CARD - AliExpress
Original Graphics Video Card for Apple iMac Core i7 2.8 27-Inch Late 2009 A1412 MC507LL/A MC507 Desktop Computer, AMD ATI Mobility Radeon HD 4850 GDDR3 512MB 109-B91157-00, GPU Upgrade Replacement : Electronics - Amazon.com
Amazon.com: Original Graphics Video Card for Apple iMac Core i7 2.8 27-Inch Late 2009 A1412 MC507LL/A MC507 Desktop Computer, AMD ATI Mobility Radeon HD 4850 GDDR3 512MB 109-B91157-00, GPU Upgrade Replacement : Electronics
iMac 27" Late 2009 Nvidia 780m Upgrade | MacRumors Forums
iMac Intel 27" EMC 2429 Radeon HD 6770M Graphics Card
Recently acquired 2007 Intel iMac (A1224), I am looking for GPU upgrade options but i can't find a list of compatible ones. Can anyone help me out on finding an either common
Failing To Max Out A Late 2009 27" iMac (Failed GPU Upgrade Attempt) - YouTube