TOKYO -- The world's most energy-efficient supercomputer is also the fastest in Japan, according to the two startups behind it.
The Gyoukou supercomputer, from Pezy Computing and ExaScaler, achieves 14.69 gigaflops per watt when running the Linpack benchmark software. The machine's home is a Kanagawa Prefecture research institute of the Japan Agency for Marine-Earth Science and Technology. Gigaflops refer to billions of floating point operations per second.
Gyoukou's environmental performance handily surpasses the 14.11 gigaflops per watt of the Tokyo Institute of Technology-hosted Tsubame 3.0, the greenest supercomputer in the June 2017 global ranking.
Gyoukou now also tops the Japanese charts in speed, at 14.13 petaflops. It steals the crown from the Oakforest-PACS system -- located at the University of Tokyo in a joint center with the University of Tsukuba -- which was recognized as the fastest in June at 13.55 petaflops. The Riken research institute's K computer clocks in at 10.51 petaflops. Petaflops refer to quadrillions of floating point operations per second.
China's Sunway TaihuLight system remains the world's fastest by far at 93.01 petaflops.
The new global rankings for speed and energy efficiency will be announced next month at an international supercomputer conference in the U.S.