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China's Tianhe-2 rated most powerful supercomputer, Japan's K 4th

TOKYO, June 24 — China's Tianhe-2, developed by the National University of Defense Technology, topped the semi-annual list of the world's most powerful supercomputers for the third consecutive time, while Japan's K computer retained fourth place, according to an announcement by the U.S.-European TOP500 project on Monday.

The second, third and fifth positions were filled by the U.S. machines Titan, Sequoia and Mira respectively. The top five units were unchanged for the third period in a row.

Tianhe-2, which first ranked top in June 2013, registered 33.86 petaflops per second (quadrillions of calculations per second), more than three times faster than K, which logged 10.51 petaflops. K, developed by the Japanese government-backed Riken institute and Fujitsu Ltd., ranked top in June and November 2011.(PNA/Kyodo)


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