iMac 21.5" Late 2009 (10,1) - CPU Upgrade E8600 | MacRumors Forums
Apple 2009 iMac A1224 20" Intel Core 2 Duo E8135 4GB 256GB SSD Linux Mint | eBay
Review: Apple's 27" big screen iMac (late 2009) | AppleInsider
iMac (2009) RAM & Storage Upgrades
Late 2009, 27 inch iMac can use 32 GB of 1333 MHz RAM, beyond what Apple says - YouTube
Install memory in an iMac - Apple Support
apple-history.com / iMac (Late 2009)
Timetec 32GB KIT(4x8GB) Compatible for Apple DDR3L 1600MHz PC3L-12800 CL11 for iMac (Mid 2011, Late 2012, Late 2013, Late 2014 Retina 5K, Mid 2015 Retina 5K) SODIMM Memory Module MAC RAM Upgrade at Amazon.com
Review: Apple's 27" big screen iMac (late 2009) | AppleInsider
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
Apple iMac 24in - 2009 Edition Review | Trusted Reviews
Apple Imac EMC-2308 | PDF | Macintosh | Airport
Review: 21.5-inch 2012 iMac takes two steps forward, one step back | Ars Technica
Apple iMac (27-inch, unibody, 2009) review: Apple iMac (27-inch, unibody, 2009) - CNET
2009 2010 Apple Mac mini IMAC macbook pro memory RAM 8GB 2x4GB DDR3 1066 1067