YouTuber upgrades base-model 5K iMac with seventh-gen Intel Core i7 processor, 64 GB of RAM, and more [Video] - 9to5Mac
parts-quick 6GB (4GB + 2GB) Memory for Apple MacBook Pro, iMac 2007 2008 Compatible PC2-5300 667MHz DDR2 SODIMM at Amazon.com
Install memory in an iMac - Apple Support
New Memory Ram Upgrade 4 Apple iMac 24" Core 2 Duo 2.4GHZ 2.8GHz A1225 MID 2007 | eBay
Memory RAM Upgrade for Apple iMac 20-inch Mid 2007 2GB DDR2 SODIMM | eBay
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
A-Tech for Apple 4GB Kit 2X 2GB PC2-5300 667MHz Mac Mini iMac Late 2006 Late 2008 Mid 2007 A1208 MA589LL A1207 MA456LL A1200 MB138LL/A A1176 MB139LL/A Memory RAM at Amazon.com
Install memory in an iMac - Apple Support
iMac Intel 20" EMC 2133 and 2210 Repair - iFixit
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
6GB Memory for 2007-2008 MacBook Pro, MacBook, and iMac
Install memory in an iMac - Apple Support
Install memory in an iMac - Apple Support
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
Memory Upgrades for Apple iMac 2007 - Up to 6GB
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