2. Reference Systems
2.1. El Capitan
El Capitan is the CORAL2 flagship supercomputer at Lawrence Livermore National Laboratory (LLNL), commissioned in 2024. It is an HPE Cray system designed for large-scale simulation and modeling, featuring AMD EPYC CPUs and AMD MI300A APUs (GPU+CPU). El Capitan is deployed in the Secure Computing Facility (SCF) and is a primary platform for the Advanced Simulation and Computing (ASC) program.
OS |
TOSS 4 |
Scheduler |
Flux |
Interconnect |
HPE Slingshot 11 |
Peak Performance |
2,792.9 PFLOPS (CPU+GPU) |
Login Nodes |
16 |
Debug Nodes |
56 |
Batch Nodes |
11,424 |
Total Nodes |
11,520 |
Total CPU Cores |
1,069,056 |
Total GPUs (APUs) |
44,544 |
Total System Memory |
5,701,632 GiB |
2.1.1. Node Architecture
CPU |
4th Gen AMD EPYC |
CPU Cores/Node |
96 |
GPU (APU) |
4x AMD MI300A (CDNA 3) per node |
GPU Memory/Node |
512 GiB (shared across 4 APUs) |
Node Memory |
512 GiB |
2.2. CTS-2
Dane is a CTS-2 class supercomputer at Lawrence Livermore National Laboratory (LLNL), commissioned in 2023. It is based on Intel Sapphire Rapids processors and is designed for high-performance computing workloads supporting the ASC and M&IC programs.
OS |
TOSS 4 |
Scheduler |
Slurm |
Interconnect |
Cornelis Networks |
Peak Performance |
10.7 PFLOPS (CPU) |
Peak Performance |
10.723 PFLOPS (CPU+GPU) |
Login Nodes |
8 |
Batch Nodes |
1,496 |
Total Nodes |
1,544 |
Total CPU Cores |
167,552 |
Total System Memory |
382,976 GiB |
2.2.1. Node Architecture
CPU Architecture |
Intel Sapphire Rapids |
CPUs/Node |
2 |
CPU Cores/Node |
112 (56 per socket) |
Threads/Node |
224 |
Memory/Node |
256 GiB DDR5-4800 |
Memory Channels/Node |
16 (8 per CPU) |
Cache/Node |
210 MB (105 MB per CPU) |
Max Turbo Frequency |
3.8 GHz |
TDP/CPU |
350 W |
2.3. H100 System
Matrix is a CTS-2 class GPU-accelerated supercomputer at Lawrence Livermore National Laboratory (LLNL), commissioned in 2025. It is based on Intel Sapphire Rapids CPUs and NVIDIA H100 GPUs, designed for advanced high-performance computing and AI/ML workloads.
Vendor |
Dell |
Location |
LLNL CZ Zone |
Year Commissioned |
2025 |
Class |
CTS-2 |
OS |
TOSS 4 |
Scheduler |
Slurm (GPU-scheduled) |
Interconnect |
InfiniBand |
Peak Performance (CPU) |
0.198 PFLOPS |
Peak Performance (GPU) |
3.800 PFLOPS |
Peak Performance (Total) |
4.000 PFLOPS |
Login Nodes |
2 |
Batch Nodes |
26 |
Debug Nodes |
2 |
Total Nodes |
30 |
Total CPU Cores |
1,792 |
Total GPUs |
112 (NVIDIA H100) |
Total System Memory |
8,064 GiB |
2.3.1. Node Architecture
CPU Architecture |
Intel Xeon Platinum 8480+ (Sapphire Rapids) |
CPUs/Node |
2 |
CPU Cores/Node |
112 (56 per socket) |
Memory/Node |
504 GiB DDR5 |
GPUs/Node |
4x NVIDIA H100 |
GPU Memory/Node |
320 GiB (80 GiB per GPU) |