Japanese research center Riken and Fujitsu announced in May this year that they were working together on a post-K supercomputer that will likely be operational in mid-2021. This decision may change the balance of power on the market of high-speed “exascale” computers. Belonging to HPE for several months, Cray announces that it has entered into an agreement with Fujitsu providing that it will install its A64FX line processors in its supercomputers. It will be the first commercial supercomputer based on innovative CPU systems. The A64FX processors are almost one hundred percent based on Arm8 architecture and have a very interesting and unusual appearance. They contain 48 basic computing cores and four additional cores. Cray announces that supercomputers based on this system have been designed with scientific institutions in mind. So they support specific technologies such as HMB (High-Bandwidth Memory, a memory interface that supports 3D DRAMs). As I mentioned above, Fujitsu and the Japanese research center Riken are working on a supercomputer and A64FX will be installed in it. It is worth knowing that Post-K is the successor of the well-known K supercomputer (based on Sparc64 VIIIfx processors), which was once designed by Fujitsu together with the now defunct Sun.