The Parallella Board

The Parallella computer platform is an open source, energy efficient, high performance, credit card sized computer based on the Epiphany multicore chips from Adapteva. This affordable platform is designed for developing and implementing high performance, parallel processing. Applications developed to take advantage of the on-board Epiphany parallel processor can achieve unprecedented performance at the lowest power in the industry.
The Epiphany 16 or 64 core chips consists of a scalable array of simple RISC processors programmable in C/C++ or a parallel programming framework like OpenCL. The mesh of independent cores are connected together with a fast on chip network within a single shared memory architecture.

The 66-core version of the Parallella board delivers over 90 GFLOPS while consuming only 5 Watts under typical work loads. For certain applications, this would provide more raw performance than a high end server costing thousands of dollars and consuming 400 Watts.