With a sustained compute power of 1.7 exaflops and a peak of over 2.7 exaflops, El Capitan knocks previous leader Frontier to second on the list of the most powerful supercomputers in the world. El Capitan was built by HPE for the National Nuclear Security Administration (NNSA) at the Lawrence Livermore National Laboratory (LLNL) to simulate nuclear weapons tests.

The supercomputer, housed at Lawrence Livermore National Laboratory, achieves 1.742 exaFLOPs. China's machines could be even faster, but it's not sharing details publicly.