The 66th edition of the TOP500 list of the world's most powerful supercomputers was announced today at the SC25 Conference in St Louis, Missouri. The new list reflects continued U.S. leadership in high-performance computing (HPC), historic European milestones, and growing global diversity across architectures and energy-efficient design.

El Capitan Extends Leadership Across Benchmarks
The El Capitan system at Lawrence Livermore National Laboratory (LLNL) remains the undisputed leader of global HPC. Based on the HPE Cray EX255a architecture, powered by AMD 4th Gen EPYC CPUs and AMD Instinct MI300A accelerators, El Capitan achieved 1.809 Exaflop/s on the HPL benchmark—a significant remeasurement that further strengthens its position as the fastest computer in the world. El Capitan also dominates the HPCG benchmark, delivering 17.41 HPCG-Petaflop/s, making it the #1 for real-world application performance. On the HPL-MxP mixed-precision benchmark, it recorded 16.7 Exaflop/s, confirming its versatility in AI and data-driven workloads. With 11.34 million cores and an energy efficiency of 60.9 GFlops/Watt, El Capitan exemplifies the current generation of exascale computing.