Most of the servers in the datacenter, especially the ones running virtualization, database, and some HPC applications, are more memory limited than anything else. There are several server memory options: UDIMMs, RDIMM, LRDIMMs, and even HCDIMMs. RDIMMs are the most commonly used. The LRDIMM in 2011 was the most popular high capacity variety, but only for those with huge budgets. In our lab we have Supermicro's Twin 2U server (6027TR-D71FRF) from our Xeon E5 review and 16 Samsung LRDIMMs and RDIMMs. We felt that dense servers and high capacity memory made for an interesting combination that's worthy of investigation. What is the situation now in 2012? Are LRDIMMs only an option for the happy few? Can a Twin node with high capacity make sense for virtualization...