CMS 32GB (4X8GB) DDR3 12800 1600MHz Non ECC SODIMM Memory Ram Upgrade Compatible with Dell® Precision Mobile Workstation M6800 - A6 at Amazon.com
Dell Precision T7400 - System Overview - YouTube
CMS 8GB (2X4GB) DDR3 10600 1333MHZ ECC Registered DIMM Memory Ram Upgrade Compatible with Dell® Precision Workstation T5500 Ecc R for Server Only - B37 at Amazon.com