iMac (27-inch, Mid 2010/Mid 2011, A1312) - Dr. Macbook Thailand
How to upgrade RAM on iMac 21.5" 2011 - YouTube
NEMIX RAM 32GB (4x8GB Upgrade) DDR3-1333 PC3-10600 204-Pin SODIMM Memory for Apple MacBook Pro Early/Late 2011, iMac Mid 2010 27 inch 4-Core, iMac Mid 2011 21.5/27”, Mac Mini Mid 2011 at Amazon.com
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
Installare la memoria in un iMac - Supporto Apple (IT)
Today picked up a $20 2011 iMac 27” with working gpu too! : r/mac
Apple iMac 2011 (Mid) 27-inch 2K (iMac 12,2) SSD ,Ram & OSX Upgrades - ZD Laptop Service Centre