Apple 20” iMac (Early 2008); iMac8,1 Installation Guides and Specifications - Macfixit Australia
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
how to Install from 2gb to 6gb gig Ram in 2008 Imac MAC 2.4 Ghz core Duo 2 Intel chip upgrade memory - YouTube
Amazon.com: Original GDDR3 512MB Graphics Video Card GPU Replacement for Apple iMac Early 2008 A1225 Core 2 Duo 3.06 MB398LL/A MB398 24-Inch Desktop PC, nVidia GeForce 8800 GS GT GTS, MXM VGA
IFIXIT iMac Intel 24 Inch EMC 2267 RAM Replacement User Manual
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
Install memory in an iMac - Apple Support
2GB DDR2 800MHz RAM Memory Upgrade for Apple iMac Core 2 Duo 24-inch (Early 2008) (PARTS-QUICK) - Walmart.com