Upgrade your iMac's RAM in less than 5 minutes - YouTube
Memory Upgrades for Apple iMac 2011 Up to 32GB
iMac 21.5" Mid 2011 How To Change/Upgrade Your Ram For Better Performance 2014 - YouTube
Install memory in an iMac - Apple Support
Cracking Open the 27" Apple iMac (2011) | TechRepublic
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
install - Installing and Upgrading Ram on a mid 2011 iMac (different size RAM) - Ask Different
How to Upgrade the RAM in Your iMac | Envato Tuts+
Juicy Crumb - 2011 27" iMac Upgrade Logic Board by Juicy Crumb Systems — Kickstarter
Memory Upgrades for Apple iMac 2011 Up to 32GB
Amazon.com: Timetec 8GB KIT(2x4GB) Compatible for Apple DDR3 1333MHz PC3-10600 for Mac Book Pro (Early/Late 2011 13/15/17 inch), iMac (Mid 2010, Mid/Late 2011 21.5/27 inch), Mac Mini(Mid 2011) RAM Upgrade : Electronics
Apple shows you how to upgrade your new iMac's RAM - 9to5Mac