Apple iMac A1312 27 inch (1TB, Intel Core i5 2nd Gen., 2.7GHz, 4GB) Desktop - Silver - MC813LL/A for sale online | eBay
Apple iMac 27" i5 2.7 (Mid 2011) - Technical data and benchmarks
How To Upgrade RAM in a Mac | Macworld
A-Tech 8GB RAM for Apple MacBook Pro (Early/Late 2011), iMac (Mid 2010 27 inch 4-Core, Mid 2011 21.5/27 inch), Mac Mini (Mid 2011) | DDR3 1333MHz PC3-10600 204-Pin SODIMM Memory Upgrade Module at Amazon.com
Upgrading 27" iMac (2011) To 32GB Of RAM - YouTube
32.0GB OWC Memory Upgrade Kit For 2010-2011 Apple iMac
iMac Intel 27" Mid 2011 EMC 2429 - used original spareparts for Macs
Install memory in an iMac - Apple Support
Install memory in an iMac - Apple Support
Apple iMac A1312 27 inch (1TB, Intel Core i5 2nd Gen., 2.7GHz, 4GB) Desktop - Silver - MC813LL/A for sale online | eBay
Best Buy: Apple 27" iMac All-in-One Computer 8 GB Memory 1 TB Hard Drive ME089LL/A