HLRS High Performance Computing Center Stuttgart: HPE Apollo (Hawk)

HPE Apollo (Hawk)

Optimized to provide large-scale computing power for complex simulations, Hawk was the flagship supercomputer of the High-Performance Computing Center Stuttgart from 2020 until early 2025. Its CPU-based architecture includes a GPU partition suitable for high-performance data analytics and artificial intelligence applications, and for hybrid workflows that combine high-performance computing and AI. With a theoretical peak performance of 26 Petaflops, Hawk debuted in 2020 at #16 on the Top500 List.

Funding

Funding for the Hawk supercomputer is provided by the German Federal Ministry of Education and Research and the Baden-Württemberg Ministry for Science, Research and Arts through the Gauss Centre for Supercomputing.

System components

System Type: Hewlett Packard Enterprise Apollo

Number of cabinets	32
Number of compute nodes	4096
System peak performance	26 Petaflops

CPU Type: AMD EPYC 7742

CPUs per node	2
Cores per CPU	64
Number of compute cores	524.288
CPU frequency	2.25 GHz
DIMMs in system	65.536
Total system memory	~1 PB

GPU system type: Apollo 6500 Gen10 Plus

Number of cabinets	4
Nodes per cabinet	6
Nodes in system	24
CPU Type	AMD EPYC
GPUs per node	8
GPU type	NVIDIA A100
GPUs in system	192
AI performance: node	~5 PFlops
AI performance: system	~120 PFlops
Node to node interconnect	Dual Rail InfiniBand HDR200

Data storage and networking

Storage: DDN EXAScaler

Disks in system	~2,400
Capacity per disk	14 TB
Total disk storage capacity	~42 PB

If you are a current HLRS system user, click here to report a problem, check on Hawk's operating status, or find technical documentation or other information related to your project.

For Users

Frontend and service nodes

Rack type: frontend and service nodes	Adaptive Rack Cooling System (ARCS)
Racks: frontend and service nodes	5 + 2 ARCS Cooling Towers
Frontend nodes	10 x HPE ProLiant DL385 Gen10
Memory of frontend nodes	5 x 1 TB, 4 x 2 TB, 1 x 4 TB
Data mover nodes	4 x HPE ProLiant DL385 Gen10
Service nodes	Red Hat Enterprise Linux 8

Node to node interconnect: InfiniBand HDR200

Interconnect topology	Enhanced 9D-Hypercube
Interconnect bandwidth	200 Gbit / s
Total InfiniBand cables	3,024
Total cable length	~20 km

Power and cooling

Power consumption

Maximum power consumption per rack	~90 kW
Power supplies in system	2,112
System power consumption, normal operation	~3.5 MW
System power consumtion, LinPack operation	~4.1 MW

Cooling

Cooling distribution units (CDUs)	6
Water inlet temperature (CDUs)	25°C
Water return temperature (CDUs)	35°C
Volume of cooling liquid in the system	~2.5 m³
Water inlet temperature (ARCS cooling towers)	16°C
Water evaporation by wet cooling towers	~9 m³/h

High-Performance Computing Center Stuttgart