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Lean, Green Machines

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The four-rack QSPACE hardware installation at the Jülich Supercomputing Centre performs 722.98 MFLOPS per watt. Credit: Proceedings of Science

Don Monroe

November 25, 2009

Designers of the German supercomputers that won the latest Green500 prize, which rewards not just computing power but energy efficiency, did not set out to win the award, but they did think carefully about energy consumption. "Nowadays, supercomputers use so much energy that it's probably more money than the purchase price," says physics professor Tilo Wettig of the University of Regensburg, so "power efficiency is extremely important."

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