Cracking Open the 27" Apple iMac (2011) | TechRepublic
Apple iMac (spring 2011) review | Engadget
iMac 27-Inch 2011 Computer | Top Brands at a Low Price
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 Repair Parts