USA · operational · hpc

Tioga

Also known as LLNL Tioga

Operated by Lawrence Livermore National Laboratory at Livermore Computing Center .

Phase 1 seed dataset, compiled by hand. These rows were built from public operator, laboratory and vendor sources. A mechanical second-reader pass has since fetched every cited source: 1092 of 1153 systems have a readable citation that names them, and 40 are genuinely weakly sourced. Every claim carries its source and a confidence tier. Treat anything below verified as a lead, not a citation.

Measured performance

Rmax: 4.55 PFlop/s
Rpeak: 5.83 PFlop/s
Rmax ÷ Rpeak: 78.0%
Cores: 30,208
Power: -
Per watt: - GF/W

Figures are as last publicly reported for the configuration described below, not a live measurement. Where a system was upgraded in place, the post-upgrade configuration is shown and the earlier one appears in the timeline.

What this machine is made of

One row per supplier relationship. “Supplier at build” is the company that shipped the part at the time; where that company has since been acquired, the parent it rolls up to today is shown beside it. That distinction is what makes ticker-level aggregation possible across a thirty-year dataset.

Role	Part	Supplier at build	Quantity	Confidence	Source
Integrator	- HPE Cray EX235a	Hewlett Packard Enterprise HPENYSE	-	Verified	top500.org hpc.llnl.gov
Accelerator	AMD Instinct MI250X Accelerators ROCm (CDNA 2) · 1.7 GHz · TSMC N6 · 560 W AMD Instinct MI250X	AMD AMDNASDAQ	-	Verified	top500.org hpc.llnl.gov
CPU	AMD EPYC 7A53 (Trento) CPUs x86-64 · 64C · 2 GHz · 7 nm · 280 W AMD Optimized 3rd Generation EPYC 64C 2GHz (Trento)	AMD AMDNASDAQ	-	Verified	top500.org hpc.llnl.gov
Interconnect	HPE Slingshot-11 Interconnect Dragonfly · 200 Gb/s per port · Around 2 microseconds Slingshot-11	Hewlett Packard Enterprise HPENYSE	-	Verified	top500.org hpc.llnl.gov
Operating system	Tri-Lab Operating System Stack Operating systems Linux distribution, RHEL-derived, HPC-tuned · Open source, LLNL-maintained TOSS 4	Lawrence Livermore National Laboratory	-	Verified	top500.org hpc.llnl.gov

The read

CORAL-2 / ATS-4 early-access system for El Capitan application readiness at Livermore Computing: HPE Cray EX235a nodes with one 64-core AMD Trento EPYC and eight MI250X GCDs each (LLNL counts 32 nodes, 2,048 CPU cores and 128 GPUs, 5.824 PFLOPS combined peak) on HPE Slingshot 11 under TOSS 4. TOP500 lists it with 30,208 cores, Rmax 4.55 PFlop/s and Rpeak 5.83 PFlop/s, first ranked 135th in June 2022, 121st in November 2022 and 314th in June 2026. TOP500 is the only source for Rmax, so the system tier is reported while the architecture edges are confirmed by both pages.

Timeline

2022 First operational source
2022-11 List debut at #121 (November 2022) source

Public list appearances

Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.

#121: TOP500, November 2022 →

Site & facility

Livermore Computing Center

Location: Livermore, CA, USA
Cooling: Direct liquid cooling (warm water)
Commissioned: 1996

hpc.llnl.gov llnl.gov

Change history

2026-10-02 Added Tioga, LLNL's El Capitan early-access system

Source check

We fetched this system's own citations and recorded whether each page actually mentions it. This is a corroboration signal, not a fact check, and it is published so you can see how well the sourcing holds up rather than take it on trust.

Cited source	Result	Found on the page
hpc.llnl.gov	names system and part	AMD EPYC 7A53 (Trento), Tri-Lab Operating System Stack
top500.org	names system and part	AMD EPYC 7A53 (Trento), AMD Instinct MI250X, HPE Slingshot-11

Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.