Apple iMac 27" A1312 Aluminum Rear Housing Case & Stand- 604-2501 : Amazon.in: Computers & Accessories
Amazon.com: Graphics Video Card for Apple iMac Mid-2011 A1312 Core i5 2.7 27-Inch Desktop PC MC813LL/A, AMD Radeon HD 6770M GDDR5 512MB 109-C29557-00, MXM VGA Board Genuine Replacement Parts : Electronics
Amazon.com: Valley Of The Sun 2GB Graphics Video Card Upgrade for Apple iMac Mid-2011 27 Inch Core i5 MC814LL/A MC814 A1312 Desktop All-in-One PC, AMD Mobility Radeon HD 6970M Replacement Repair Parts :