Frankfurt, Germany, June 24 2020:   A Japanese supercomputer has  toppled the  "Usual Suspects",  China and the US to take top spot in the biennial Top500 supercomputer speed rankings.
Fugaku, a computer co-developed by Riken and Fujitsu, makes use of Fujitsu’s 48-core A64FX system-on-chip. It’s the first time a computer based on ARM processors has topped the list. Fugaku, turned in a High Performance Linpack (HPL) result of 415.5 petaflops, besting the now second-place Summit system by a factor of 2.8x. In single or further reduced precision, which are often used in machine learning and AI applications, Fugaku’s peak performance is over 1,000 petaflops (1 exaflops). The new system is installed at RIKEN Center for Computational Science (R-CCS) in Kobe, Japan.
Number two on the list is Summit, an IBM-built supercomputer that delivers 148.8 petaflops on HPL. The system has 4,356 nodes, each equipped with two 22-core Power9 CPUs, and six NVIDIA Tesla V100 GPUs andis running at Oak Ridge National Laboratory (ORNL) in Tennessee and remains the fastest supercomputer in the US
At number three is Sierra, a system at the Lawrence Livermore National Laboratory (LLNL) in California achieving 94.6 petaflops on HPL. Its architecture is very similar to Summit, equipped with two Power9 CPUs and four NVIDIA Tesla V100 GPUs in each of its 4,320 nodes.
Sunway TaihuLight, a system developed by China’s National Research Center of Parallel Computer Engineering & Technology (NRCPC) drops to number four on the list. The system is powered entirely by Sunway 260-core SW26010 processors. Its HPL mark of 93 petaflops has remained unchanged since it was installed at the National Supercomputing Center in Wuxi, China in June 2016.
At number five is Tianhe-2A (Milky Way-2A), a system developed by China’s National University of Defense Technology (NUDT).  Its HPL performance of 61.4 petaflops is the result of a hybrid architecture employing Intel Xeon CPUs and custom-built Matrix-2000 coprocessors. It is deployed at the National Supercomputer Center in Guangzhou, China.
Indian systems in Top 500.
With shifting goalposts, India has just two systems in the Top 500 both imported Cray systems:
At number 67 is the Pratyush - Cray XC40 system at the Indian Institute of Tropical  Meteorology clocking 3763.9 teraflops ( 3.76 peta flops)
At 120 is the Mihir Cray XC40 at the National Centre for Medium Range Weather Forecasting clocking  2570.4 tera flops( 2.57 petaflops)