MareNostrum 5 ACC

BSC provides MareNostrum’s accelerated HPC partition to scientific computing users.

MareNostrum 5 ACC is an operational GPU cluster run by Barcelona Supercomputing Center in Barcelona, Spain. It has 4,480 NVIDIA Hopper, 64 GB HBM GPUs installed.

Supercomputer

Verified 11 Nov 2026

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Facts

Source per value

Owner / operator Organization that owns or operates the GPUs. Hosting and facility roles are listed under Partners.: Barcelona Supercomputing Center 1
GPU maker NVIDIA, AMD or Intel, taken from the GPU model.: NVIDIA 1
GPU model Accelerator model or family as disclosed. A GH200 is one GPU on a superchip; an MI300A is an APU that contains a GPU.: NVIDIA Hopper, 64 GB HBM 1
GPUs installed Physical GPUs in the cluster, from the operator or a deterministic sum of disclosed quantities (nodes × GPUs per node). Planned counts, H100-equivalents and unaudited press totals are never counted here.: 4,480 1
GPU count notes What the count covers (one partition, one site, a design limit), qualifiers and competing figures.: Derived ACC-partition total: 1,120 nodes × 4 GPUs; separate AI partitions excluded. 1
Location City, region and country where the cluster sits. Empty when the operator does not name the site.: Barcelona, Spain 1
Country Country of the cluster, taken from the location.: Spain 1
Live power MW Power in service, in megawatts of IT load where the source says so. Company figures are marked in the notes; Epoch AI satellite estimates are labelled as estimates.: Not published
Status operational = running and named as such by the operator or a primary source; partly operational = a phase is live and more is coming; under construction = building underway; announced = disclosed or contracted with no confirmed go-live.: operational 1
Status notes The source’s wording on status, with the date.: Listed in the operator’s current user documentation. 1
Interconnect Cluster network fabric.: InfiniBand NDR200 1

Sources

res2.bsc.es accessed 2026-11-11

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