RAM upgrade considerations for iMac systems - CNET
Timetec Hynix IC 16GB KIT(2x8GB) Compatible for Apple DDR3 PC3-8500 1067MHz/1066MHz Upgrade for MacBook 13'' Mid 2010, MacBook Pro 13'' Mid 2010, iMac 27''Late 2009, Mac Mini Mid 2010(16GB KIT(2x8GB)) Laptop Memory -
DDR3 1333MHZ PC3-10600 SODIMM for Apple iMac 2010 27" & 21.5" (11,3 11
OWC Performance Upgrades for iMac 2010
How to Upgrade Memory in a 21.5-inch or 27-inch iMac (Mid 2010) - YouTube