CMS 16GB (4X4GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Apple® iMac Core I3 3.06 21.5-Inch (Mid-2010) - A28 at Amazon.com
Memory RAM Upgrade for Apple iMac 21.5-inch Mid 2010 4GB DDR3 SODIMM | eBay
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
Install memory in an iMac - Apple Support
iMac Upgrade Guide for Intel iMacs
2009 2010 Apple Mac Mini Imac Macbook Pro Memory Ram 8gb 2x4gb Ddr3 1066 1067 - Rams - AliExpress
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
How to Upgrade RAM on MacBook Pro, iMac & More | AVG
Install memory in an iMac - Apple Support
Apple iMac 2010 8GB DDR3 1333MHz PC3-10600 204-Pin SoDIMM
Install memory in an iMac - Apple Support
RAM upgrade considerations for iMac systems - CNET
How to Upgrade iMac RAM (21.5" and 27" Aluminum): EveryMac.com