Supercomputers/Systems/HPC5
Italy · operational · hpc
HPC5
Operated by Eni at Eni Green Data 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
- 35.45 PFlop/s
- Rpeak
- 51.72 PFlop/s
- Rmax ÷ Rpeak
- 68.5%
- Cores
- 669,760
- Power
- 2.25 MW
- Per watt
- 15.7 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 C4140 | Dell Technologies | - | Verified | top500.orgeni.com |
| Accelerator | NVIDIA Tesla V100 Accelerators CUDA (Volta GV100) · 5,120C · 1.53 GHz · 12 nm · 300 W four NVIDIA V100 per node, 1,820 nodes | NVIDIA | 7,280 estimated | Verified | industriaitaliana.itinno3.it |
| Interconnect | NVIDIA InfiniBand HDR Interconnect Fat tree or dragonfly+ · 200 Gb/s per port · About 0.6 microseconds Mellanox HDR InfiniBand 200 Gb/s, full non-blocking | NVIDIA | - | Verified | inno3.ittop500.org |
| Operating system | CentOS Operating systems Linux distribution, RHEL-compatible rebuild · Open source, community-maintained CentOS Linux 7 | The CentOS Project | - | Reported | top500.org |
The read
Eni's Dell PowerEdge system of 1,820 nodes, each with two Xeon Gold CPUs and four NVIDIA V100 GPUs, presented in February 2020 and sixth on the June 2020 TOP500. Eni and two Italian trade pages independently give the hardware, so those edges are verified; TOP500 is the only source for Rmax, Rpeak and cores. The GPU count is our arithmetic from the node count, so it is marked estimated.
Timeline
Public list appearances
Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.
Site & facility
Change history
- 2026-09-22 Gained a Green500 rank pointer (#53 on the 2023-11 list)
- 2026-09-20 Added with a rank pointer on the edition where it ranked highest
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 |
|---|---|---|
| eni.com | names system only | - |
| top500.org | names system and part | NVIDIA Tesla V100, NVIDIA InfiniBand HDR, CentOS |
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.