Used Apple iMac 21.5-inch 500GB Hard Drive 4GB RAM I3 Proessor (Mid 2010) - ZD Laptop Service Centre
Installing additional SSD in Mid-2010 27" iMac
Rasalas 4GB DDR3 1333MHz PC3-10600 SODIMM RAM Memory Compatible for Apple Early Late 2011 13/15/17 Inch MacBook Pro, Mid 2010 and Mid Late 2011 21.5/27 Inch iMac, Mid 2011 Mac Mini : Amazon.es: Informática
iMac Mid-2010 27 inch (A1312) SSD and RAM disassembly and upgrade - Much FASTER! - YouTube
How to Upgrade Memory in a 21.5-inch or 27-inch iMac (Mid 2010) - YouTube