USA · operational · hpc

Ruby (LLNL)

Also known as LLNL Ruby

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: 3.70 PFlop/s
Rpeak: 6.02 PFlop/s
Rmax ÷ Rpeak: 61.5%
Cores: 85,568
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	- Supermicro SYS-2029TP-HTR	Supermicro SMCINASDAQ	-	Reported	top500.org
CPU	- Intel Xeon Platinum 8276L 28C 2.2GHz	Intel INTCNASDAQ	-	Reported	top500.org
Interconnect	Omni-Path Architecture Interconnect Fat tree · 100 Gb/s per port · About 1 microsecond Cornelis Networks Omni-Path	Cornelis Networks	-	Reported	top500.org
Operating system	Tri-Lab Operating System Stack Operating systems Linux distribution, RHEL-derived, HPC-tuned · Open source, LLNL-maintained Linux/TOSS	Lawrence Livermore National Laboratory	-	Reported	top500.org

The read

Livermore Computing's Ruby, a Supermicro SYS-2029TP-HTR cluster of Intel Xeon Platinum 8276L 28C 2.2GHz processors on Cornelis Networks Omni-Path, installed 2020 and running Linux/TOSS per TOP500. TOP500 gives 85,568 cores, Rmax 3.70 PFlop/s and Rpeak 6.02 PFlop/s, and lists it from 79th in November 2020 to 310th in June 2025 (the last edition in which it appears; status_as_of reflects that). LLNL's November 2020 TOP500 write-up confirms the 3.7 petaflops HPL result, the No. 79 ranking and its use for unclassified NNSA stockpile stewardship work, funded by the ASC program, Multi-programmatic and Institutional Computing, and COVID relief funds. Rmax, Rpeak and cores come from TOP500 only, so the tier is reported.

Timeline

2020 First operational source
2020-11 List debut at #79 (November 2020) source

Public list appearances

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

#79: TOP500, November 2020 →

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 Ruby, LLNL's Xeon 8276L cluster

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
top500.org	names system and part	Omni-Path Architecture
llnl.gov	does not name this system	-

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