El Capitan (supercomputer)

El Capitan
Active	Deployment: 2H 2023; Completion: 2H 2023;
Sponsors	U.S. Department of Energy
Operators	Lawrence Livermore National Laboratory and U.S. Department of Energy
Location	Oak Ridge Leadership Computing Facility
Architecture	HPE Cray Shasta
Power	40 MW (Proj)
Operating system	HPE Cray OS
Space	TBA
Memory	TBA
Storage	TBA
Speed	2 exaFLOPS (Rmax) (Proj)
Cost	US$600 millions (estimated cost)
Purpose	Scientific research and development

Hewlett Packard Enterprise El Capitan, is an upcoming exascale supercomputer, hosted at the Lawrence Livermore National Laboratory in Livermore, United States and projected to become operational in 2023. It is based on the Cray EX Shasta architecture. When deployed, El Capitan is projected to displace Frontier as the world's fastest supercomputer.

Design

El Capitan has been announced to use an unknown number of AMD Instinct MI300 CPUs. The MI300 consists of 24 AMD Zen AMD64-based CPU cores, and CDNA 3-based GPU integrated onto a single organic package, along with 128GB of HBMe RAM.[1]

The floor space and number of racks for El Capitan have not yet been announced.

Blades are interconnected by HPE Slingshot 64-port switch that provides 12.8 terabits/second of bandwidth. Groups of blades are linked in a dragonfly topology with at most three hops between any two nodes. Cabling is either optical or copper, customized to minimize cable length. Total cabling runs 145 km (90 mi).

El Capitan has coherent interconnects between CPUs and GPUs, allowing GPU memory to be accessed coherently by code running on the Epyc CPUs.[2]

History

El Capitan was ordered as a part of the Department of Energy's CORAL-2 initiative, intended to replace Sierra (supercomputer), an IBM/NVIDIA machine deployed in 2018. The original design envisioned hundreds of thousands of GPUs and 40 MW of power. LLNL partnered with HPE Cray and AMD to build the system.[3]

References

Smith, Ryan (January 25, 2023). "ces-2023-amd-instinct-mi300-data-center-apu-silicon-in-hand-146b-transistors-shipping-h223". Anandtech. Retrieved February 13, 2023.
"AMD Preparing More Linux Code For The Frontier Supercomputer". Archived from the original on May 28, 2021.
Trader, Tiffany (August 13, 2019). "Cray Wins NNSA-Livermore "El Capitan" Exascale Contract". hpcwire.com. Retrieved February 13, 2023.

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[AT_MI300_Computex-1] Smith, Ryan (January 25, 2023). "ces-2023-amd-instinct-mi300-data-center-apu-silicon-in-hand-146b-transistors-shipping-h223". Anandtech. Retrieved February 13, 2023.

[2] "AMD Preparing More Linux Code For The Frontier Supercomputer". Archived from the original on May 28, 2021.

[HPCWire_El_Capitan-3] Trader, Tiffany (August 13, 2019). "Cray Wins NNSA-Livermore "El Capitan" Exascale Contract". hpcwire.com. Retrieved February 13, 2023.