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
Apple iMac 27-inch, Mid 2010 Memory 4 GB. Not Used Since 2015 | eBay
32.0GB OWC Memory Upgrade Kit For 2010-2011 Apple iMac
iMac RAM Models 11.3 (i5 and i7 only) to 12.2 (8GBx4) | MacMemory.com
iMac 27" Mid 2010 i7 CPU 20GB ram 1TB HD, OSX High Sierra, 4k USB camera giving garbage pattern on camera feed to Lightburn - LightBurn Hardware Compatibility - LightBurn Software Forum
Apple iMac 27" - 2.93GHz Quad Core i7 - 16GB RAM - 250GB SSD - 1TB - High Sierra | eBay
Install memory in an iMac - Apple Support
iMac Mid-2010 27 inch (A1312) SSD and RAM disassembly and upgrade - Much FASTER! - YouTube