Hmmm... wonder if this could go even faster using Cluster-on-Die mode in the new E5-2600v3 CPUs (It splits each CPU into 2 NUMA nodes).
Its also worth noting that the fastest memory configuration is 4x16GB DDR4-2133 DIMMs. Gets you the lowest latency and highest bandwidth according to Intel.
Another note, I see the CPU in the writeup reports as "cpu MHz: 1199.953" - have you turned off C-States?