Science-Based US Supercomputer Fastest in World

At least for the moment, the world's fastest supercomputer is devoted to solving scientific questions that may save the planet — climate change, renewable energy, new medicines — rather than advances in nuclear weapons that might blow it up.

The Oak Ridge National Laboratory's high-performance Jaguar XT5 computer, built by Seattle-based Cray Inc., was named Monday as the fastest on the planet in the latest semiannual TOP500 list of the world's most powerful supercomputers.

After a $19.9 million upgrade funded with federal economic stimulus money, Jaguar posted a performance speed of 1.759 petaflops or quadrillions of calculations per second.

That dropped previous No. 1 Los Alamos National Laboratory's IBM Roadrunner system in New Mexico to No. 2 with a speed of 1.04 petaflops.

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