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Japan's K Computer Retains TOP500 Crown

Japan's K Computer

Japan's "K Computer" does 10 quadrillion calculations a second.

Credit: RIKEN

Japan's K Computer retained its title as the world's most powerful supercomputer, ranking first in the most recent edition of the TOP500 List with a speed of 10.51 petaflops a second, which was four times faster than the second fastest system on the Linpack benchmark. China's Tianhe-1A system ranked second with a speed of 2.57 petaflops per second.

The rankings for the top 10 supercomputers on the most recent list remained unchanged from June 2011, when the previous list was released. "This is the first time since we began publishing the list back in 1993 that the top 10 systems showed no turnover," says TOP500 editor Erich Strohmaier.

The U.S.'s Jaguar, Cielo, Pleiades, Hopper, and Roadrunner systems, ranked third, sixth, seventh, eighth, and 10th, respectively. China has 75 systems in the TOP500, making it the number two high-performance computer-using country, behind the United States, but ahead of Japan, France, and Germany.

In addition, 39 of the TOP500 systems use graphics processing units as accelerators. The 500th spot on the list went to a system running at 50.9 teraflops per second on the Linpack benchmark, up from 39.1 teraflops per second for the final spot on the list six months ago.

From HPC Wire
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