Apple iMac 27-inch Late 2009 - 3.06GHz Core 2 Duo Apple RAM Memory | Kingston
CMS 8GB (2X4GB) DDR3 8500 1066MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Apple® iMac Core 2 Duo 3.06 21.5-Inch (Late 2009) - A35 at Amazon.com
iMac Intel 21.5" and 27" (Late 2009-Mid 2010) SSD Upgrade Bundle - iFixit Store
Install memory in an iMac - Apple Support
How to Upgrade the RAM in Your iMac
Can the Late 2009 27" iMac handle 32GB of RAM? | MacRumors Forums
How to Upgrade the RAM in Your iMac
How to Upgrade the RAM in Your iMac
Early 2009 model iMac Computer, DDR3 8GB (2x4GB) RAM Replacement - YouTube
Memory Upgrades for Apple iMac 2009 - Up to 32GB
Install memory in an iMac - Apple Support
Timetec 16GB KIT(4x4GB) Compatible for Apple DDR3 1067MHz / 1066MHz PC3-8500 CL7 Dual Rank for iMac (Late 2009 21.5-inch / 27-inch) SODIMM Memory MAC RAM Upgrade for iMac 10,1 and iMac 11,1 at Amazon.com