CMS 16GB (2X8GB) DDR3 12800 1600MHz Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Thinkcentre M73 / M73E Tiny - A7 at Amazon.com
4GB Memory Upgrade for Lenovo ThinkCentre M73 Small/Tower DDR3 PC3-12800 1600MHz Non-ECC Desktop DIMM RAM Upgrade (PARTS-QUICK Brand) at Amazon.com
Lenovo ThinkCentre M73 Small Form Factor Business Desktop Intel Core i5 4th Gen 4570 (3.20 GHz)8GB RAM 1TB HDD Intel HD Graphics, Windows 10 Pro 64-bit, Wifi, Keyboard & Mouse