El Capitan Supercomputer Ranks as Fastest Public Machine in US and Europe
El Capitan, a supercomputer located at Lawrence Livermore National Laboratory, has been identified as the fastest public supercomputer in the United States and Europe. According to the June 2026 TOP500 list, El Capitan achieved an HPL speed (Rmax) of 1,809.00 PFlop/s, placing it second globally behind China's LineShine. The supercomputer is powered by AMD 4th Gen EPYC processors and AMD Instinct MI300A accelerators, utilizing HPE's Slingshot-11 network. It operates for the National Nuclear Security Administration (NNSA) and was installed in 2024. El Capitan's performance significantly surpasses other leading supercomputers in the US and Europe, including Frontier at Oak Ridge National Laboratory and Aurora at Argonne National Laboratory, which rank second and third respectively in the region. Its energy efficiency is reported at 60.94 Gigaflops/watt, and it holds the second-highest HPCG benchmark score globally.
