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
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
How (And Why) To Install More RAM In Your iMac
Apple iMac Pro 5K 27-inch (Late 2017) 3.2GHz 32GB RAM 1TB SSD- Buy Refurbished iMac 2017 at Techable
Does the mid 2011 iMac (21.5") support 32… - Apple Community