MareNostrum 5 GPP

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: 40.10 PFlop/s
Rpeak: 46.37 PFlop/s
Rmax ÷ Rpeak: 86.5%
Cores: 725,760
Power: 5.75 MW
Per watt: 7.0 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	- ThinkSystem SD650 v3	Lenovo 992HKEX	-	Reported	top500.org
CPU	Intel Xeon Platinum 8480C CPUs x86-64 · 56C · 2 GHz · Intel 7 · 350 W Xeon Platinum 8480+ 56C 2GHz	Intel INTCNASDAQ	-	Verified	top500.org bsc.es
Interconnect	NVIDIA InfiniBand NDR (Quantum-2) Interconnect Fat tree or dragonfly+ · 400 Gb/s per port · Under 0.6 microseconds Infiniband NDR200	NVIDIA NVDANASDAQ	-	Verified	top500.org bsc.es
Storage	IBM Spectrum Scale ESS (GPFS) Storage Parallel filesystem (GPFS), erasure-coded declustered RAID · 250 PB on Summit (Alpine) · About 2.5 TB/s IBM Spectrum Scale file system (site-wide, shared with the accelerated partition)	IBM IBMNYSE	-	Verified	bsc.es storagenewsletter.com
Cooling	Direct liquid cooling, warm water Cooling Direct-to-chip cold plates, facility water loop · Removes 90+ percent of node heat to liquid both partitions get Direct Liquid Cooling	Eviden ATOEPA rolls up to Atos	-	Reported	storagenewsletter.com
Operating system	Red Hat Enterprise Linux Operating systems Linux distribution · Open source, commercial support subscription RedHat 9.1	Red Hat IBMNYSE rolls up to IBM	-	Reported	top500.org

The read

The general-purpose (CPU-only) partition of the same MareNostrum 5 machine this dataset already tracks the accelerated half of as `marenostrum-5-acc`, the same split-system pattern already applied to Isambard-AI, ABCI and Shaheen III. BSC's own page independently confirms the Xeon Platinum 8480+/NDR200 hardware and states a peak of 45.9 Pflops, close to but not an exact match of TOP500's 46.37, so the exact performance figures stay reported.

Timeline

2023 First operational source
2023-11 List debut at #79 (November 2023) 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

Barcelona Supercomputing Center

Location: Barcelona, Spain
Cooling: Direct liquid cooling
Commissioned: 2005

bsc.es

Change history

2026-09-22 Gained a Green500 rank pointer (#79 on the 2023-11 list)

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	Intel Xeon Platinum 8480C, NVIDIA InfiniBand NDR (Quantum-2)
bsc.es	names system and part	Direct liquid cooling, warm water

Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.