[jklontz]

For reference, current DDR4 RAM to CPU is ~0.5 Tb/s [0].

[0] http://ark.intel.com/products/81059/Intel-Xeon-Processor-E5-... (see "Max Memory Bandwidth")

[sak]

Usually you don't have to share your memory bandwidth with others nearby.

[mentat]

Doing so within a rack might be quite handy.