CMS 32GB (2X16GB) DDR3 12800 1600MHz ECC Registered DIMM Memory Ram Upgrade Compatible with HP/Compaq® Workstation Z620 DDR3 for Server Only - B17 at Amazon.com
32GB (2x16GB) DDR3-1600MHz PC3-12800 Non-ECC UDIMM 2Rx8 Desktop Memory Module by NEMIX RAM at Amazon.com
BD16GX21600MTR97 Black Diamond 16GB DDR3 Server Memory
SK Hynix 32GB 2x16GB DDR3 PC3-14900R 1866MHz Server RAM HMT42GR7AFR4C- – Dynamic Computer Surplus