Supercomputers/Systems/Hops
USA · operational · hpc
Hops
Also known as SNL CTS-2 Hops
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
- 10.03 PFlop/s
- Rpeak
- 17.59 PFlop/s
- Rmax ÷ Rpeak
- 57.0%
- Cores
- 40,960
- 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 | - Dell PowerEdge XE8640 | Dell Technologies | - | Reported | top500.org |
| Accelerator | NVIDIA H100 SXM5 Accelerators CUDA (Hopper GH100) · 16,896C · 1.98 GHz · TSMC 4N · 700 W NVIDIA H100 SXM5 80GB, four GPUs per node per Sandia | NVIDIA | - | Verified | top500.orgsandia.gov |
| CPU | - Intel Xeon Platinum 8480+ 56C 2GHz | Intel | - | Reported | top500.org |
| Interconnect | NVIDIA InfiniBand NDR (Quantum-2) Interconnect Fat tree or dragonfly+ · 400 Gb/s per port · Under 0.6 microseconds NVIDIA Infiniband NDR | NVIDIA | - | 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
Sandia's GPU-accelerated CTS-2 system, a Dell PowerEdge XE8640 cluster of Xeon Platinum 8480+ hosts with NVIDIA H100 SXM5 80GB GPUs on InfiniBand NDR running TOSS. TOP500 lists 40,960 cores, Rmax 10.03 and Rpeak 17.59 PFlop/s, first appearing 116th in November 2024 and listed 186th in June 2026. A Sandia HPC annual report confirms H100-class GPUs on Hops and credits them with fire simulations up to 20 times faster than on the CTS-1 Eclipse system; a June 2026 Sandia news item describes four GPUs per Hops node and a successor, Cronus, with 16 nodes of eight H200 GPUs. Neither Sandia page gives node counts, vendor or an in-service date, and TOP500's 2024 install year is not recorded as one, so first operational is blank. The campus is not stated, so the site is left blank.
Timeline
- 2025-06 List debut at #142 (June 2025) source
Public list appearances
Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.
Change history
- 2026-10-04 Added Hops (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 |
|---|---|---|
| sandia.gov | names system and part | NVIDIA H100 SXM5 |
| top500.org | names system and part | NVIDIA H100 SXM5, NVIDIA InfiniBand NDR (Quantum-2) |
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.