4GB -2x2GB Memory Ram Upgrade for 20" Apple iMac-7.1 2.0GHz Core2Duo Mid 2007 | eBay
A-Tech 32GB (2x16GB) RAM for Apple iMac 2017 (27 inch Retina 5K & 21.5 inch Retina 4K) | DDR4 2400MHz SODIMM PC4-19200 2Rx8 1.2V 260-Pin SO-DIMM Memory Upgrade Kit
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
How to Install RAM in an iMac: 5 Steps (with Pictures) - wikiHow
The infamous 2007 iMac on Catalina | MacRumors Forums
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
Install memory in an iMac - Apple Support
4.0GB OWC Memory Upgrade Kit For MacBook Pro and iMac
memory - How much more RAM can I add to my Mid 2007 24" iMac? - Ask Different