Samsung ram Memory Upgrade DDR3 PC3 12800, 1600MHz, 204 PIN, SODIMM for 2012 Apple MacBook Pro's, 2012 iMac's, and 2011/2012 Mac Mini's (16GB kit (2 x 8GB)) at Amazon.com
How Much RAM Do You Need? A Guide to Capacity | Digital Trends
Apple Memory Module 16GB DDR4 2400MHz SO-DIMM (2x8GB) - Apple
How Much RAM (Memory) Do You Need? Different Workloads explored