Supercomputers/Systems/Lockhart TDS
USA · operational · hpc
Lockhart TDS
Also known as AMD Lockhart TDS
Operated by AMD .
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
- 6.06 PFlop/s
- Rpeak
- 7.68 PFlop/s
- Rmax ÷ Rpeak
- 78.9%
- Cores
- 33,984
- 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 | - | Reported | top500.org |
| Accelerator | AMD Instinct MI250X Accelerators ROCm (CDNA 2) · 1.7 GHz · TSMC N6 · 560 W AMD Instinct MI250X | AMD | - | Reported | top500.org |
| CPU | - AMD Optimized 3rd Generation EPYC 64C 2GHz | AMD | - | Reported | top500.org |
| Interconnect | HPE Slingshot-11 Interconnect Dragonfly · 200 Gb/s per port · Around 2 microseconds Slingshot-11 | Hewlett Packard Enterprise | - | Reported | top500.org |
| Operating system | HPE Cray Operating System Operating systems SUSE-derived Linux, container-based management · Proprietary layer over open-source Linux HPE Cray OS | Hewlett Packard Enterprise | - | Reported | top500.org |
The read
AMD's Lockhart test and development system (TDS), an HPE Cray EX235a cluster of AMD Optimized 3rd Generation EPYC 64C 2GHz hosts with AMD Instinct MI250X GPUs on Slingshot-11 under HPE Cray OS, listed by TOP500 under the site name AMD QTS Data Center and installed 2021 per TOP500. It has 33,984 cores, Rmax 6.06 PFlop/s, Rpeak 7.68 PFlop/s and 61.57 TFlop/s on HPCG. It debuted at rank 214 on the June 2025 list and was 244th in November 2025, its last list; a larger sibling, Lockhart TDS 56 (52,864 cores, Rmax 8.33 PFlop/s), ranked 195th in November 2025 and is not recorded as a separate row here. TOP500 is the only source fetched, so the tier is reported; the data-centre city and power draw are not published there.
Timeline
- 2025-06 List debut at #214 (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
- 2026-10-07 Added Lockhart TDS (amd)
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 | AMD Instinct MI250X, HPE Slingshot-11, HPE Cray Operating System |
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.