iMac RAM Models 11.3 (i5 and i7 only) to 12.2 (8GBx4) | MacMemory.com
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 32GB KIT(4x8GB) Compatible for Apple DDR3 1333MHz PC3-10600 CL9 for iMac (Mid 2010 27 inch, Mid 2011 21.5/27 inch) SODIMM Memory Module MAC RAM Upgrade for iMac 11,3 / iMac 12,1 / iMac 12, 2 : Electronics
Apple 27" All-In-One Intel Core i5 32GB Memory 1TB SSD Silver 13614641 - Best Buy
Apple says it's vintage. It's a 21.5 in 2011 iMac w/ 32GB ram, 4GB AMD wx4150, 512GB and 1TB internal SSDs on a 2nd primary 2011 Thunderbolt Display running Ubuntu. Playing some Apex Legends right now : r/retrobattlestations