LUMI node architecture
LUMI is operated by EuroHPC/CSC in Finland. This profile covers Ranked system / partition.
Cluster interconnect: Slingshot-11. Topology: Not verified.
LUMI-G
- Node count
- 2978
- CPU
- AMD EPYC Trento · 64 cores
- CPUs per node
- 1
- Accelerator
- AMD MI250X
- Physical accelerators per node
- 4
- Host / unified memory
- 512 GiB DDR4
- Accelerator memory
- 128 GB per physical accelerator
- Local accelerator links
- Infinity Fabric
- CPU-to-accelerator link
- Not verified
- Storage
- Not verified
Scope and uncertainty
LUMI-G partition only. Each physical MI250X contains two GPU dies; diagram counts physical accelerators. LUMI-C and LUMI-D are outside this profile.
Not verified means a detail has not been confirmed in this catalog. Diagrams are schematic; node indices are illustrative, not physical hostnames. Data checked 14 September 2026.
Sources
Browse all cluster architecture pages →
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