Supercomputers/Systems/Eclipse (Sandia)
USA · operational · hpc
Eclipse (Sandia)
Also known as SNL/NNSA CTS-1 Eclipse
Operated by Sandia National Laboratories .
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
- 1.36 PFlop/s
- Rpeak
- 1.84 PFlop/s
- Rmax ÷ Rpeak
- 73.9%
- Cores
- 54,648
- 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 | - Penguin Computing Tundra Extreme Scale | Penguin Computing | - | Verified | top500.orghpc.sandia.gov |
| CPU | Intel Xeon E5-2695 v4 CPUs x86-64 · 18C · 2.1 GHz · 14 nm · 120 W Intel Xeon E5-2695 v4 18C 2.1GHz, two sockets per node, 1,488 nodes | Intel | - | Verified | top500.orghpc.sandia.gov |
| Interconnect | Omni-Path Architecture Interconnect Fat tree · 100 Gb/s per port · About 1 microsecond Intel Omni-Path | Cornelis Networks | - | Verified | top500.orghpc.sandia.gov |
The read
Sandia's largest CTS-1 capacity cluster, a Penguin Computing Tundra Extreme Scale system of dual 18-core Xeon E5-2695v4 2.1GHz nodes on Intel Omni-Path running Linux/TOSS, acquired as an expansion alongside the earlier CTS-1 platforms. Sandia's HPC cluster page lists Eclipse at 1,488 nodes and 53,568 cores deployed in January 2018; TOP500 lists 41,256 cores at 1.14 PFlop/s Rmax and 480 kW when it debuted at rank 191 in June 2018, then 54,648 cores with Rmax 1.36 and Rpeak 1.84 PFlop/s from June 2019 (rank 304) through November 2020 (rank 486). An Asetek press release names Eclipse among the Sandia CTS-1 clusters installed by Penguin Computing. The core counts differ between sources, so the record is held at reported.
Timeline
Public list appearances
Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.
Change history
- 2026-10-09 Added Eclipse (Sandia)
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.sandia.gov | names system and part | Intel Xeon E5-2695 v4, Omni-Path Architecture |
| top500.org | names system and part | Intel Xeon E5-2695 v4, Omni-Path Architecture |
Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.
Further reading
Operating a supercomputer
Acceptance testing, why "installed" and "in production" are six months apart, and the machine lifecycle.
Inside a node
Latency-optimised versus throughput-optimised processors, NUMA, and the end of the host-to-device copy.
The interconnect
Topologies, why latency and tail behaviour matter more than bandwidth, and how the fabric market consolidated.