Otus - Technical description
In second half of 2025, PC2 will inaugurate the new Lenovo HPC system, called Otus, which is delivered, installed and maintained by pro-com Datensysteme GmbH. The computer system will be made available for nationwide use as part of the National High Performance Computing (NHR) initiative and will support the Atomistic Simulation research priority, among others. The current Noctua 2 system at PC2 will thus be complemented by another HPC system with approximately twice the computing power.
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| Manufacturer | Lenovo |
|---|---|
| Number of Processor Cores | 142,656 |
| Number of GPUs | 108 |
| Total Main Memory | 593,3 TiB |
| Floating-Point Performance | CPU: 11,44 PFLOPS DP Peak (8,42 PFlop/s Linpack) GPU: 7,45 PFLOPS DP Peak (4,65 PFlop/s Linpack) |
| Cabinets | 11 racks - all components with direct liquid cooling, 2 racks - all processors with direct liquid cooling, 6 racks - air cooling |
| Compute Nodes | 636 nodes, each with • 2x CPU, Turin AMD EPYC 9655 • 2x 96 cores, 2.6 GHz up to 4.5 GHz • 768 GiB main memory |
| Compute Nodes (Large Memory) | 48 nodes, each with • 2x CPU, Turin AMD EPYC 9655 • 2x 96 cores, 2.6 GHz up to 4.5 GHz • 1,536 GiB main memory |
| GPU Nodes | 27 nodes, each with • 2x CPU, Turin AMD EPYC 9655 • 2x 96 cores, 2.6 GHz up to 4.5 GHz • 768 GiB main memory • 4x NVIDIA H100-94GB |
| FPGA Nodes | 32 FPGA nodes, each with • 2x CPU, Turin AMD EPYC 9655 • 2x 96 cores, 2.6 GHz up to 4.5 GHz • 768 GiB main memory • FPGA configuration (pilot installation with 3x AMD Alveo V80, expansion TBA) |
| Communication Network | Nvidia NDR InfiniBand, blocking factor 2:1 |
| Storage System | IBM Spectrum Scale > 5 PB capacity (Flash + Hard disks) |
In the Top500 list 06/2025, Otus is on position #164 (CPU partition) and on position #255 (GPU partition).
In the Green500 list 06/2025, Otus is on position #5 (GPU partition)