Supercomputers/Systems/MareNostrum 5 AI
Spain · under construction · ai training
MareNostrum 5 AI
Also known as MareNostrum 5 AI Upgrade; BSC AI Factory system
Operated by Barcelona Supercomputing Center at Barcelona Supercomputing 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
- -
- Rpeak
- -
- Rmax ÷ Rpeak
- -
- Cores
- -
- 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 | - Fsas Technologies led the consortium that won the EuroHPC contract | Fsas Technologies | - | Reported | bsc.eseurohpc-ju.europa.eu |
| Integrator | - Telefonica co-led the consortium that won the EuroHPC contract | Telefonica | - | Reported | bsc.eseurohpc-ju.europa.eu |
| Integrator | - Supermicro compute hardware | Supermicro | - | Reported | bsc.es |
| Accelerator | - NVIDIA accelerators for the LLM training and inference partitions, model not published | NVIDIA | - | Reported | bsc.es |
| Storage | - IBM storage for the new AI-oriented file system | IBM | - | Reported | bsc.es |
| Storage | VAST Data Platform Storage Disaggregated shared-everything VAST storage systems for the new AI-oriented file system | VAST Data | - | Reported | bsc.es |
The read
The AI upgrade of MareNostrum 5 for the BSC AI Factory: two new partitions, one for training large language models and one for inference, plus a new AI-oriented file system. EuroHPC signed with a consortium led by Fsas Technologies and Telefonica on 26 January 2026 (EUR 129 million, half EuroHPC and half Spain, Portugal and Turkiye). BSC names Supermicro hardware, NVIDIA accelerators and software, and IBM and VAST storage, with installation scheduled for the first half of 2026 at BSC's headquarters data center and the Torre Girona chapel. Accelerator model and counts are not published and no commissioning notice was found, so it stays under construction.
Timeline
- 2026-01-26 Announced source
Site & facility
Barcelona Supercomputing Center
- Location
- Barcelona, Spain
- Cooling
- Direct liquid cooling
- Commissioned
- 2005
Change history
- 2026-10-07 Added MareNostrum 5 AI (BSC)
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 |
|---|---|---|
| eurohpc-ju.europa.eu | names system only | - |
| bsc.es | names system and part | VAST Data Platform |
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.
Storage and I/O
Parallel file systems, why checkpointing dominates the write load, and the metadata failure mode nobody expects.