China has retaken the top slot on the twice-yearly Top500 List of supercomputers announced this week at the International Supercomputing Conference in Leipzig, Germany.

The top high-performance computer was China's Tianhe-2 (MilkyWay-2), which houses 3.12 million Intel Xeon and Xeon Phi cores, over five-times as many as the AMD/Nvidia powered second place Titan at Oak Ridge National Laboratory, and almost twice as many as the third-place IBM-powered Sequoia at Lawrence Livermore National Laboratory.
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Milky-Way-2, offering over 50-petaflops of performance, will power the National Supercomputer Center in Guangzhou, China. Its 3.12 million cores are spread across 32,000 octal-core 22-nanometer Intel Xeon E5-2600 processors and 48,000 Intel Xeon Phi coprocessor cards.
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The architecture is divided among 16,000 nodes each with two Intel Xeon Ivy Bridge processors and three Xeon Phi processors. Milky-Way-2's peak performance of 54.9 petaflops can be sustained indefinitely at 33.86 petaflops on the standard Linpack benchmark.