GreenArrays, the makers of the GA144 chip, has an OEM partnership with Schmart Board that will allow hobbyists and experimenters to use a chip with 144 cores running about 90 billion instructions per second at a total power of under one watt (typical) while running at full clip and which only uses about 14 microwatts when everything is idle.
Adapteva has a multicore chip that can run at 70 gigaFLOPs per watt.
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