Lawrence Livermore National Laboratory

U.S. Department of Energy, HPE and AMD have partnered with Lawrence Livermore National Laboratory to develop El Capitan, the fastest, verified supercomputer in the world.

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Front view of El Capitan supercomputer.

Hewlett Packard Enterprise delivers one of the world's fastest, verified supercomputers, "El Capitan," for Lawrence Livermore National Laboratory

El Capitan achieves 1.809 exaflops, becoming one of the most powerful supercomputers in the world. The supercomputer features 100% fanless direct liquid-cooling technology from HPE and ranks as one of the top 30 most energy-efficient supercomputers on the Green500 list.

The world's first three verified exascale supercomputers, all built by HPE, are on the TOP500 list of the most powerful systems.

View the press release
  • #2

    Built by HPE, LLNL's El Capitan supercomputer is #2 on the Top500 list%3Ca%20href%3D%22https%3A%2F%2Ftop500.org%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%22%20external-link%3D%22true%22%20data-analytics-region-id%3D%22footnote_tip%7Clink_click%22%3ETop500%3C%2Fa%3E%2C%20June%202026 with 1.809 exaflops of performance

  • #2

    Built by HPE, LLNL's El Capitan supercomputer is #2 on the HPCG list with 17.41 petaflops of performance%3Ca%20href%3D%22https%3A%2F%2Ftop500.org%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%22%20external-link%3D%22true%22%20data-analytics-region-id%3D%22footnote_tip%7Clink_click%22%3ETop500%3C%2Fa%3E%2C%20June%202026

  • #1

    Built by HPE, LLNL's El Capitan supercomputer is #1 on the HPL-MxP list with 16.7 exaflops of performance%3Ca%20href%3D%22https%3A%2F%2Ftop500.org%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%22%20external-link%3D%22true%22%20data-analytics-region-id%3D%22footnote_tip%7Clink_click%22%3ETop500%3C%2Fa%3E%2C%20June%202026

El Capitan news and resources

  • Predicting tsunamis in seconds with physics-based modeling document.
    Case study
    Predicting tsunamis in seconds with physics-based modeling

    By integrating real-time sensor data and full-physics modeling using an exascale supercomputer, a new forecasting system can predict the arrival of tsunami waves in seconds, helping save lives.

    Learn more
  • Side view of El Capitan supercomputer.
    Podcast
    How do you make the world's fastest, verified supercomputer?

    Technology Now dives into the world of supercomputers, and how El Capitan, the world's fastest, verified supercomputer, was built. We will explore the software and hardware requirements as well as investigating the physical requirements needed to even be able to run a supercomputer on your premises. Bronis de Supinski, CTO of Livermore Computing at Lawrence Livermore National Laboratory, tells us more.

    Listen to the podcast
  • Hurricane Florence as it churned across the Atlantic in a west-northwesterly direction with winds of 130 miles an hour.
    Podcast
    What do you do with the world's fastest, verified supercomputer?

    Technology Now looks further into the world of supercomputers and explores what the world's fastest, verified supercomputer, El Capitan, and its sister machine, Tuolumne, are used for. Rob Rieben, a computational physicist at Lawrence Livermore National Laboratory, tells us more.

    Listen to the podcast
  • A person works at a desk in a modern office.
    Blog post
    Behind the scenes on building an exascale computer

    HPE reflects on the journey to exascale.

    Read the blog post
  • El Capitan supercomputer.
    Web page
    Road to El Capitan

    Explore this multi-part article series detailing the El Capitan build.

    View the web page