MareNostrum 5 Supercomputing Center

10 MW AI data center in Barcelona, Spain: operational.

MareNostrum 5 Supercomputing Center is a 10 MW AI data center project located in Barcelona, Spain, currently operational. It is being built by Barcelona Supercomputing Center. The site is grid-powered (low-carbon with heat reuse). This project is one of thousands of data-center facilities tracked by Data Center Index across Spain, covering operational, under-construction, announced, and permitted sites.

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Frequently asked questions

What is MareNostrum 5 Supercomputing Center?
MareNostrum 5 Supercomputing Center is an AI compute deployment that is not a standalone campus in Barcelona, Spain tracked by Data Center Index. Its status is operational.
Where is MareNostrum 5 Supercomputing Center?
MareNostrum 5 Supercomputing Center is in Barcelona, Spain.
How big is MareNostrum 5 Supercomputing Center?
Data Center Index tracks MareNostrum 5 Supercomputing Center at 10 MW. That capacity is an estimate. We modeled or inferred it, and no source states it. This entry is not a standalone campus, so it is left out of campus counts and capacity totals.
Who is building MareNostrum 5 Supercomputing Center?
Barcelona Supercomputing Center is developing MareNostrum 5 Supercomputing Center.

Sources

  1. AI Data Center Index facility profile: Marenostrum 5 Supercomputing Center Spain (aidci · aggregator · 2026-04-29)
  2. Lenovo (news.lenovo.com · press · 2026-09-12)