The Summit is almost ready to go online and it will become the fastest supercomputer ever built. It will average between 150 and 300 petaflops of processing power and will integrate 4,600 nodes that are powered by IBM and Nvidia processors, consuming 15 MW in full load.
https://www.notebookcheck.net/Summit-will-be-the-world-s-fastest-supercomupter-upon-completion.260132.0.html