Calxeda shows their new ARM Cortex-A15 based ECX-2000 supporting 16GB RAM on quad-core, used by HP in one of their new HP Moonshot ARM Server platform. Performance is 2x to 3x faster than their previous ARM Cortex-A9 Server platform. Calxeda also has 2 64bit ARM Server chips on their Roadmap with full production systems to be expected for early 2015 or so.
You can read more about Calxeda ECX-2000 at http://www.calxeda.com/ecx-2000-family/
