Further to my comments from my visit to AMD about the future of memory systems, you might like to have a look at these slides from Intel: http://hpcadvisorycouncil.com/events/2014/stanford-workshop/presentations/da... Maybe in particular slides 17-22. This is from an Exascale meeting at Stanford this week, http://hpcadvisorycouncil.com/events/2014/stanford-workshop/agenda.php Best wishes Paul