2nd Place: New Supercomputer Leader Relies On ARM

2nd Place: New Supercomputer Leader Relies On ARM

The list of the most powerful supercomputers in the world has developed very dynamically in recent months. At the top is "Fugaku", a Japanese system that can beat the x86 competition for the first time with special ARM processors.

The world of supercomputers is now dominated by ARM CPUs for the first time

The world's most powerful computing systems have been in the Top 500 since 1993, and now the 55th edition of the supercomputer charts has been presented. As the author emphasizes, since the presentation of the last top list in November 2019, many new systems have secured a place among the top supercomputers. However, the new number 1 is in the spotlight.
"The new top system, Fugaku, achieved an HPL result (High-Performance Linpack) with 415.5 petaflops and outperformed the second place Summit system by a factor of 2.8," said the top 500 makers. Fugaku is at the Japanese research institute RIKEN Center for Computational Science (R-CCS) in Kobe and brings along with the new record in terms of performance a real specialty: The system is the first at the top of the Top 500, which is equipped with ARM processors.
Specifically, Fugaku relies on the A64FX SoC from Fujitsu, which is based on ARM architecture and was introduced by the company in a blog post earlier this year. As Fujitsu explains, the A64FX was specially developed for use in supercomputers, offers around 9 billion transistors with 48 cores, and is manufactured in a 7nm process. 
Thanks to the integrated high bandwidth memory (HBM2) "aggregated 1,024 GB / s between the main memory and the CPU cores" is possible. Fugaku has 152,000 of these processors.

ARM is still a real rarity

ARM CPUs are still a real curiosity in the top 500. Currently, 481 of the 500 systems rely on x86 architecture. Intel has 469 systems, AMD is used in 11 supercomputers, one is powered by Hygon cores. ARM processors are used in four systems, three of them use A64FX SoCs from Fujitsu, one relies on Marvel's ThunderX2 CPUs. Japan, supercomputers, Fujitsu, RIKEN, FugakuRIKEN