Supercomputers/Systems/ROMEO-2025
France · operational · mixed
ROMEO-2025
Also known as ROMEO
Operated by University of Reims Champagne-Ardenne at ROMEO HPC 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
- 9.86 PFlop/s
- Rpeak
- 16.32 PFlop/s
- Rmax ÷ Rpeak
- 60.4%
- Cores
- 47,328
- Power
- 160.16 kW
- Per watt
- 61.6 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 | - Eviden BullSequana XH3000 | Eviden | - | Reported | top500.orgglobenewswire.com |
| Accelerator | NVIDIA GH200 Grace Hopper Superchip Accelerators Arm CPU + CUDA GPU · TSMC 4N 232 NVIDIA GH200 Grace Hopper Superchips in 58 quad-GPU nodes | NVIDIA | 232 reported | Reported | globenewswire.comtop500.org |
| CPU | NVIDIA Grace CPUs Armv9 (Neoverse V2) · 72C · 3.1 GHz · TSMC 4N Grace Hopper Superchip 72C 3GHz | NVIDIA | - | Reported | top500.org |
| Interconnect | NVIDIA InfiniBand NDR (Quantum-2) Interconnect Fat tree or dragonfly+ · 400 Gb/s per port · Under 0.6 microseconds NVIDIA Quantum-2 InfiniBand (TOP500: Quad-Rail NDR200) | NVIDIA | - | Reported | globenewswire.comtop500.org |
| Storage | - 2.8 PB IBM ESS storage | IBM | - | Reported | globenewswire.com |
| Cooling | Direct liquid cooling, warm water Cooling Direct-to-chip cold plates, facility water loop · Removes 90+ percent of node heat to liquid Direct liquid cooling with hot water for servers and racks | Eviden | - | Reported | globenewswire.com |
| Operating system | - Red Hat Enterprise Linux | Red Hat | - | Reported | top500.org |
The read
The University of Reims Champagne-Ardenne's ROMEO HPC Center system, an Eviden BullSequana XH3000 with NVIDIA GH200 Grace Hopper Superchips that placed second on the Green500 in November 2024, June 2025 and November 2025 at 70.9 GFlops/Watt. Eviden's May 2024 announcement describes 232 GH200 superchips in 58 quad-GPU nodes on NVIDIA Quantum-2 InfiniBand, a CPU partition of 8,448 cores, 2.8 PB of IBM ESS storage and hot-water direct liquid cooling, with the 8 petaflops total capacity quoted in that release. TOP500 lists 47,328 cores, 9.86 PFlop/s Rmax, 16.32 PFlop/s Rpeak and 160.16 kW, ranking it 122nd in November 2024.
Timeline
- 2024-05 Announced source
- 2024-11 List debut at #122 (November 2024) source
- 2024-11 First operational source
Public list appearances
Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.
Site & facility
ROMEO HPC Center
- Location
- Reims, France
- Cooling
- Direct liquid cooling (hot water)
- Commissioned
- 2024
Change history
- 2026-10-02 Added ROMEO-2025, the Reims GH200 system, No. 2 on the Green500 three times running
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 | NVIDIA GH200 Grace Hopper Superchip, NVIDIA Grace, NVIDIA InfiniBand NDR (Quantum-2) |
| globenewswire.com | names system, part and count | NVIDIA GH200 Grace Hopper Superchip, NVIDIA Grace, NVIDIA InfiniBand NDR (Quantum-2), Direct liquid cooling, warm water · counts: 232 |
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
Why accelerators exist, what the memory hierarchy costs, and how the CPU and accelerator merged onto one package.
The interconnect
Topologies, why latency and tail behaviour matter more than bandwidth, and how the fabric market consolidated.