Amazon.com: Valley Of The Sun Original 1GB Graphics Card for Apple iMac 2010 27" Core i7 2.93 Desktop Computer MC784LL/A MC784 A1312, ATI Radeon HD 5750 GDDR5 1 GB Video Cards GPU
Original Ati HD 6970M 5750m 4850 4670 Graphics Card Video Card 1GB 2GB 109-C29657-10
The Best Hardware of 2010 | bit-tech.net
nVIDIA Quadro K3100M 4GB Metal Video Card for iMac 11,1 / 11,3 / 12,2 A1312