Supercomputers/Systems/HPC2
Italy · operational · hpc
HPC2
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
- 3.19 PFlop/s
- Rpeak
- 4.61 PFlop/s
- Rmax ÷ Rpeak
- 69.2%
- Cores
- 72,000
- Power
- 1.23 MW
- Per watt
- 2.6 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 | - IBM iDataPlex DX360M4 (about 1,500 nodes) | IBM | - | Verified | top500.orgnextplatform.com |
| Accelerator | NVIDIA Tesla K20X Accelerators CUDA (Kepler GK110) · 2,688C · 0.732 GHz · 28 nm · 235 W NVIDIA K20x | NVIDIA | - | Verified | top500.orgnextplatform.com |
| CPU | - Intel Xeon E5-2680v2 10C 2.8GHz | Intel | - | Verified | top500.orgnextplatform.com |
| Interconnect | Mellanox InfiniBand FDR Interconnect Fat tree · 56 Gb/s per 4x port · About 1 microsecond Infiniband FDR | Mellanox NVDANASDAQ
rolls up to NVIDIA | - | Reported | top500.org |
The read
Eni's 2014 IBM iDataPlex DX360M4 cluster at the Green Data Center in Ferrera Erbognone: about 1,500 nodes, each with two Xeon E5-2680 v2 (10-core, 2.8 GHz) CPUs and NVIDIA Tesla K20X GPUs, on InfiniBand FDR. TOP500 reports 3.188 PFlop/s Rmax and 4.605 PFlop/s Rpeak on 72,000 cores and 1,227 kW; The Next Platform independently gives 3.19 PFlop/s sustained and 4.61 PFlop/s aggregate for the same node design. Ranked 12th on the June 2014 list, its best placing, and still listed at rank 353 on June 2025, which is the basis for the status date. The Wikipedia article on Eni's HPC systems places it in the same Green Data Center. It predates the HPC4 (2018), HPC5 (2020) and HPC6/HPC7 (2024) systems already in this dataset.
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
- 2026-10-02 Added Eni HPC2, the 2014 iDataPlex K20X cluster, 12th on the June 2014 TOP500
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 |
|---|---|---|
| nextplatform.com | names system and part | NVIDIA Tesla K20X, Mellanox InfiniBand FDR |
| top500.org | names system and part | Mellanox InfiniBand FDR |
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.