Differences Between Late 2012 and Late 2013 Aluminum iMac: EveryMac.com
CMS 32GB (4X8GB) DDR3 12800 1600MHz Non ECC SODIMM Memory Ram Upgrade Compatible with Apple® iMac Core i7 3.5 27-Inch (Late 2013) MF125LL/A - A6 at Amazon.com
iMac 27-Inch "Core i7" 3.5 Late 2013 Max RAM is higher than 32gb | MacRumors Forums
8GB Memory (PC3L-12800, DDR3L 1600MHz) for Apple MacBook Pro 15 inch A1286 Mid 2012. Apple MacBook Pro 13 inch A1278 - Mid 2012. iMac 21.5 inch A1418 Late 2012, A1418 Early 2013,
Memory Upgrades for iMac 27-Inch (2012 - Mid 2015)
Apple iMac 27″ late 2015 Intel Core i5 3.3Ghz 5K Display A1419
Apple iMac Late 2013 - 21.5-Inch - Core i5 - 8 GB RAM - 1 TB HDD – PCMaster Pro
iMac 2013 Model Ram Upgrade - YouTube
Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013
Mac RAM Upgrade, Best iMac Memory Upgrade – Best Reviews
NEMIX RAM 16GB Kit (2x8GB 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
iMac Intel 21.5" EMC 2638 Teardown - iFixit
Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013
New CPUs, faster Wi-Fi, same flaws: Apple's 2013 iMac reviewed | Ars Technica
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
Refurbished Apple iMac 14,2/i5-4670/16GB RAM/1TB HDD/775M/27"/A (Late 2013) | Mac4sale
Memory upgrade: Apple iMac 2012/2013/2014 (Howto)
The Display - 21.5-inch iMac (Late 2013) Review: Iris Pro Driving an Accurate Display
A-Tech 32GB Kit (4x8GB) RAM for Apple iMac (Late 2012, Late 2013, Late 2014, Mid 2015) | DDR3 1600MHz SODIMM PC3-12800 204-Pin SO-DIMM Max Memory Upgrade : Amazon.ca: Electronics
Late 2013 iMac review: Faster than before, but the gains over previous models are modest | Macworld