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
Apple iMac 24-inch "Core 2 Duo" 2.8 GHz Early 2008 MB325LL/A A1225 As Is Read KM | eBay
Upgrading my Early-2008, 24-inch iMac with an SSD - Analog Senses
Apple A1225 24-inch iMac Core 2 Duo 2.8 GHz 4 GB RAM 320 GB HDD Early 2008 885909243839 | eBay
iMac (2009) RAM & Storage Upgrades
iMac Intel 24" EMC 2134 and 2211 Repair - iFixit
Apple iMac Early 2008 Intel Core 2 Duo (2017 Review) - YouTube
Install memory in an iMac - Apple Support (PH)
Maximum RAM iMac early 2008 | MacRumors Forums
CMS 2GB (1X2GB) DDR2 6400 800MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Apple® iMac Core 2 Duo 2.8 24-Inch (Early 2008) - A40 at Amazon.com
Apple iMac "Core 2 Duo" 2.66 20-Inch (Early 2008) , 320 GB Hard Drive, 2 GB RAM - Imagine41
20-Inch iMac (2007-2008) Hard Drive Installation Video (iMac7,1 iMac8,1) - YouTube
Memory Upgrades for Apple iMac 2008 - Up to 6GB
Apple iMac 24-Inch "Core 2 Duo" 2.8 (Early 2008), 320GB HD, 2GB RAM, OS 10.8 885909243839 | eBay
Apple iMac (24-inch Penryn) - Review 2008 - PCMag UK