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From NextBigFuture.com
HPCWire - just three and half years after IBM broke the petaflop barrier with its Roadrunner supercomputer, Fujitsu's "K computer" has passed the 10 petaflops mark. Fujitsu and RIKEN announced on Tuesday that they have completed the final build-out of the system and achieved 10.51 petaflops on Linpack, reaching a major milestone of Japan's Next-Generation Supercomputing Project.
The completed K system, housed at RIKEN's Advanced Institute for Computational Science in Kobe, is powered by more than 88 thousand SPARC64 VIIIfx CPUs. The 8-core SPARC64 VIIIfx chip was purpose-built for HPC, delivering 128 peak gigaflops at 2.0 GHz, while drawing a relatively modest 58 watts. Although each CPU represents a single node, four of the SPARC chips are glued to a single motherboard, 24 of which make up a rack. The whole system is comprised of 864 of these racks.
The peak petaflops for the final system is a whopping 11.28 petaflops, and thanks to the Fujitsu's 6D Tofu interconnect, the system was able to squeeze better than 93 percent Linpack efficiency from the floating pointing parts -- a rather remarkable feat. Total time for the Linpack run: 29 hours and 28 minutes.
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http://beforeitsnews.com/story/1331/585/Fujitsu_K_supercomputer_hits_a_record_10.51_petaflops_and_supercomputers_in_the_United_States_and_China.html
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