20-Inch iMac (2007-2008) Hard Drive Installation Video (iMac7,1 iMac8,1) - YouTube
CMS 4GB (2X2GB) DDR2 5300 667MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Apple® iMac (Mid 2007) Pc2-5300 - A37 at Amazon.com
Install memory in an iMac - Apple Support
Install memory in an iMac - Apple Support
Memory Upgrades for Apple iMac 2007 - Up to 6GB
iMac Memory Upgrade (2007 Model) - YouTube
CMS 4GB (2X2GB) DDR2 5300 667MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Apple® iMac (Mid 2007) Pc2-5300 - A37 at Amazon.com
How to Upgrade iMac RAM (20" and 24" Aluminum): EveryMac.com
iMac Intel 20" EMC 2133 and 2210 Repair - iFixit
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
iMac (2007-2009) Memory Installation Video - YouTube
New Memory Ram Upgrade 4 Apple iMac 24" Core 2 Duo 2.4GHZ 2.8GHz A1225 MID 2007 | eBay
Memory Upgrades for Apple iMac 2007 - Up to 6GB
An upgrade to my mom's 2007 iMac | Raoul Pop
6GB Memory for 2007-2008 MacBook Pro, MacBook, and iMac
Install memory in an iMac - Apple Support
How to install RAM in an iMac (Mid 2007) - YouTube
Memory RAM Upgrade for Apple iMac 20-inch Mid 2007 2GB DDR2 SODIMM | eBay
Install memory in an iMac - Apple Support
OWC 16GB (2x8GB) ram Upgrade PC3-12800 DDR3L 1600MHz sodimm 204 Pin CL11 Memory Upgrade Kit Compatible with Late iMac, Mac Mini, and MacBook Pro Computer at Amazon.com