How to Install RAM in an iMac. Extra memory, or Random Access Memory (RAM) can be inserted or installed into the memory slots of… | Imac, Repair videos, Ram upgrade
How to Upgrade iMac RAM (21.5" and 27" Aluminum): EveryMac.com
Install memory in an iMac - Apple Support
Install memory in an iMac - Apple Support
NEMIX RAM 32GB Kit (4x8GB Upgrade) DDR3-1600 SODIMM PC3-12800 for Apple MacBook Pro Mid 2012 / iMac Late 2012 / iMac 2013, Late 2014, Mid 2015, Mac Mini Late 2012 at Amazon.com
hardware - Can I add different size RAMs to iMac 5K? - Ask Different
How to Upgrade Memory in a 21.5-inch or 27-inch iMac (Mid 2010) - YouTube