iMac (2007-2009) Memory Installation Video - YouTube
20″ iMac (Early 2008) | Low End Mac
A-Tech for Apple 1GB DDR2 667MHz PC2-5300 200-pin SODIMM for MacBook, MacBook Pro, iMac, Mac Mini - (Early/Mid/Late 2006, Mid/Late 2007, Early 2008, Early 2009) - Memory RAM Module at Amazon.com
Install memory in an iMac - Apple Support
A-Tech for Apple 4GB Kit (2X 2GB) DDR3 1067MHz / 1066MHz PC3-8500 SODIMM Memory RAM
iMac Intel 24" Early 2008 EMC 2211 - used original spareparts for Macs
Apple iMac 2008 A1225 MB398LL/A 24" C2D E8435 3.06GHz 4GB RAM 500GB HD Catalina 885909213375 | eBay
OWC Memory Upgrades For 24" & 20" iMac (2008)
CMS 6GB (1X4GB) & (1X2GB) DDR2 6400 800MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Apple® iMac Core 2 Duo 2.4 20-Inch Early 2008 - B117 at Amazon.com
2008 24" iMac Hard Drive & Ram Upgrade - YouTube
Apple iMac 24" Desktop - MB393B/A (2008) for sale online | eBay
Install memory in an iMac - Apple Support
How to Upgrade iMac RAM (20" and 24" Aluminum): EveryMac.com
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