1.102 exaflops/sec.   (1.192 x 10**18)

The fastest supercomputer is now located in the US
[1]https://share.newsbreak.com/173iiia0

   "The Frontier system is based on Hewlett Packard Enterprise (HPE)'s
   CrayEX platform which houses AMD EPYC 64C 2GHz processors along with
   AMD Instinct 250X professional GPUs. According to [2]PC Mag, there are
   more than 9,400 CPUs and 37,000 GPUs set up in 74 purpose-built
   cabinets which takes the tally of cores to 8,730,112. "

   "The combined computing power of these processing units was tested on
   an HPL benchmark which returned a score of 1.102 Exaflops (10 ^18) per
   second, the first for any supercomputer in the world. In comparison,
   Fugaku, which is theoretically an exascale supercomputer, manages a
   benchmark score of 442 petaflops per second. The Frontier system also
   features a 700 petabytes storage with HPE's Slingshot high-performance
   ethernet for data transfers. "

   "To ensure that the supercomputer does not overheat, 6,000 gallons
   (22,712 liters) of water are pumped through these cabinets every minute
   using four pumps, PC Mag reported. "

References

   1. https://share.newsbreak.com/173iiia0
   2. https://uk.pcmag.com/components/140614/us-takes-supercomputer-top-spot-with-first-true-exascale-machine