27" iMac Late 2009 A1312 Disassembly RAM SSD Hard Drive Upgrade LCD Screen Glass Replacement Repair - YouTube
OWC Performance Upgrades for iMac 2010
Apple iMac 27-inch Late 2009 - 2.8GHz Core i7 Apple RAM Memory | Kingston
iMac Intel 27" EMC 2309 and 2374 Teardown - iFixit
Apple iMac 21.5" AIO High Sierra 3.06GHz Intel Core2 Duo 8GB Ram 500GB Late 2009 | eBay
A-Tech 16GB Kit (2x8GB) DDR3 1066MHz / 1067MHz PC3-8500 SODIMM RAM for Apple MacBook (13 inch, Mid 2010), MacBook Pro (13 inch, Mid 2010), iMac (27 inch, Late 2009), Mac Mini (Mid 2010) at Amazon.com
16GB -2x8GB Memory Ram Upgrade 27" Apple iMac-11.1 Core i5 2.66GHz Late 2009 | eBay
Install memory in an iMac - Apple Support
Sold - 27" iMac Late 2009 // $295 - Boulder Mac Repair
A-Tech 16GB Kit (2x8GB) DDR3 1066MHz / 1067MHz PC3-8500 SODIMM RAM for Apple MacBook (13 inch, Mid 2010), MacBook Pro (13 inch, Mid 2010), iMac (27 inch, Late 2009), Mac Mini (Mid 2010) at Amazon.com