4GB RAM Memory for Dell PowerEdge T110 II Black Diamond Memory Module DDR3 ECC UDIMM 240pin PC3-12800 1600MHz Upgrade - Walmart.com
CMS 16GB (2X8GB) DDR3 12800 1600MHz ECC Non Registered DIMM Memory Ram Upgrade Compatible with Dell® Poweredge T20 EccU for Server Only - B89 at Amazon.com
Dell PowerEdge T20 review
Installing two memory modules of different sizes (PowerEdge T20) - Dell Community
Dell PowerEdge T20 review
parts-quick 8GB Memory for Dell PowerEdge T20 DDR3 PC3-12800E ECC RAM Upgrade at Amazon.com
CMS 16GB (2X8GB) DDR3 12800 1600MHz ECC Non Registered DIMM Memory Ram Upgrade Compatible with Dell® Poweredge T20 EccU for Server Only - B89 at Amazon.com