Calxeda's ARM-based servers provide significant efficiency advantages over traditional x86 servers for scale-out workloads. The FAWN project at CMU demonstrated that a cluster of low-power ARM nodes could achieve over 360 queries per joule for key-value store applications, two orders of magnitude better than traditional servers. Calxeda's ECX-1000 servers based on Cortex-A9 ARM processors showed 70% higher performance per watt than Intel Xeon servers for web application workloads. Upcoming servers using Cortex-A15 and Cortex-A57 ARM processors are expected to provide even better performance. These efficiency gains make ARM servers well-suited for distributed applications like storage, analytics and