How to upgrade iMac (2020) RAM and save up to $2000 - 9to5Mac
A-Tech for Apple 6GB Kit (1x2GB + 1x4GB) DDR2 667MHz PC2-5300 200-pin SODIMM for MacBook (Late 2007, Early 2008, Early 2009), MacBook Pro (Mid 2007, Early 2008), iMac (Mid 2007) - Memory RAM Upgrade at Amazon.com
how to Install from 2gb to 6gb gig Ram in 2008 Imac MAC 2.4 Ghz core Duo 2 Intel chip upgrade memory - YouTube
Apple iMac (20-Inch Early 2008) 2.66GHz Intel Core 2 Duo, 320GB HDD, 4GB Memory | eBay
Install memory in an iMac - Apple Support
Memory Upgrades for Apple iMac 2008 - Up to 6GB
A-Tech for Apple 6GB Kit (1x2GB + 1x4GB) DDR2 667MHz PC2-5300 200-pin SODIMM for MacBook (Late 2007, Early 2008, Early 2009), MacBook Pro (Mid 2007, Early 2008), iMac (Mid 2007) - Memory RAM Upgrade at Amazon.com
OWC 6GB (2GB + 4GB) PC8500 DDR3 1066MHz SO-DIMMs Memory Compatible with Late 2008, Early 2009, Early 2010 MacBook, MacBook Pro Unibody Models, 2009/2010 Mac Mini, 2009 iMac Models at Amazon.com
Mac Pro (Pre-2008) Memory Installation Video - YouTube
How to Upgrade iMac RAM (20" and 24" Aluminum): EveryMac.com