How to upgrade RAM / Memory on a 2010 iMac Core i3 i5 i7 (21.5in & 27in) - YouTube
RAM upgrade considerations for iMac systems - CNET
Timetec Hynix IC 16GB KIT(2x8GB) Compatible for Apple DDR3 PC3-8500 1067MHz/1066MHz Upgrade for MacBook 13'' Mid 2010, MacBook Pro 13'' Mid 2010, iMac 27''Late 2009, Mac Mini Mid 2010(16GB KIT(2x8GB)) - Newegg.com
Can you upgrade the RAM in the 27-inch iMac? | iMore
How-To: Boost your Mac's speed and prolong its useful life with easy RAM upgrades - 9to5Mac
16GB -2x8GB Memory Ram Upgrade for 27" Apple iMac-11.3 Core i5 3.6GHz Mid 2010 | eBay
16GB Memory Upgrade Kit For Apple iMac 2010-2011
Is it worth it to upgrade RAM on Mid 2010 21.5 iMac? | MacRumors Forums
Install memory in an iMac - Apple Support
How To Upgrade RAM in a Mac | Macworld
iMac with Retina 5K Display 2014/2015 Memory Upgrades
Amazon.com: OWC 8 GB (2 X 4GB) ram PC8500 DDR3 1066MHz sodimm 204-pin Memory Upgrade Kit, (OWC8566DDR3S8GP), Compatible with MacBook Pro, MacBook, Mac Mini and iMac : Everything Else
iMac (mid 2010 - early 2019) SSD & Arbeitsspeicher/RAM Upgrade/Aufrüstung | iMac (2010 - 2019) | Mac Upgrade/Aufrüstung | Tronicspot