iMac 27 RAM memory upgrade Easy How To Tutorial Mid 2011 - YouTube
Memory Upgrades for Apple iMac 2011 Up to 32GB
16GB -2x8GB Memory Ram Upgrade for 27" Apple iMac-12.2 Core i7 3.4GHz Mid 2011 | eBay
install - Installing and Upgrading Ram on a mid 2011 iMac (different size RAM) - Ask Different
2011 imac 27" 32GB - final stage of 1TB + 2TB SSD upgrade (replaced HDD & optic drive). Also cleaned out the fans and case. Running 'SSD Fan Control' & 'Macs Fan
Timetec 32GB KIT(4x8GB) Compatible for Apple DDR3L 1600MHz PC3L-12800 CL11 for iMac (Mid 2011, Late 2012, Late 2013, Late 2014 Retina 5K, Mid 2015 Retina 5K) SODIMM Memory Module MAC RAM Upgrade at Amazon.com
New 16GB 4x4GB Memory Apple iMac (21.5 and 27-inch, Mid 2011) PC3-10600 at Amazon.com
27" iMac Offers Easier RAM Upgrade
OWC 24GB (2 x 4GB + 2 x 8GB) PC10600 DDR3 1333MHz SO-DIMMs Memory RAM Upgrade Compatible with 2011 MacBook Pro, Mid 2010/2011 21.5" & 27" iMac Models, 2011 Mac Mini (OWC1333DDR3S24S) at Amazon.com