A Research Infrastructure for science with extreme-scale data and computing needs

Alps is a general-purpose compute and data Research Infrastructure (RI) open to the broad community of researchers in Switzerland and the rest of the world. Alps will provide a high-impact, challenging and innovative RI that will allow Switzerland to advance science and impact society.

Alps enables the creation of versatile clusters (vClusters) that can be tailored to the specific needs of users while maintaining confidentiality. For example a vCluster will be dedicated to MeteoSwiss’ numerical weather forecasts, another one to the User Lab and another one to Machine Learning and Artificial Intelligence.

Alps is geo-distribuited over different sites. This allows  for example to provide geographically redundant supercomputing services or to access large amounts of data stored in different locations.

Alps is currently housed at the following locations:

  • CSCS in Lugano
  • EPFL in Lausanne
  • Paul Scherrer Institbute (PSI) in Villingen for data archiving.
  • ECMWF in Bologna for access to meteorologica data.



ModelHPE Cray EX
InterconnectHPC Cray Slingshot @ 200 Gbps injection per module / GPU
Scratch disk

100 + 10 PB on hard disk

5 + 1 PB on Solid State Disk (SSD)

Data archive and backup2 x 130 PB tape libraries


Nodes Overview

# of nodes# of sockets per nodeTotal # of socketsProcessor(s)SpecificationsTFlops


410,752NVIDIA Grace-Hopper64 core ARM cores, 128 LPDDR RAM, H100 GPU with 96 GB HBM3 memoryn/a
1,02422,048AMD EPYC 7742 CPU (Rome)2x64 cores, 256/512 GB DDR RAM4,719
1441 CPU + 4 GPU720AMD EPYC host CPU + NVIDIA A10064 cores, 128 GB DDR RAM) and 4 NVIDIA A100-96/80 (96/80 GB HBM2En/a
1284512AMD Mi300A CPU+GPU n/a
24124AMD EPYC host CPU + AMD Mi250X GPU64 cores, 128 GB RAM) and 4 AMD Mi250X GPUn/a

Installation & Upgrade History

January - June 2024

Stepwise installation of the 2,688 nodes with NVIDIA Grace-Hopper processors for a total of 10,752 sockets.

April 2024

To enhance the capability and availability of its Research Infrastructure, CSCS is collaborating with EPFL to extend its extreme-scale computing and data infrastructure Alps to the campus of EPFL. This extension of Alps will be available as failover for the Federal Office of Meteorology and Climatology MeteoSwiss service in spring 2024.

Read the press release >

October 2023

Extension of the scratch disk with 5 + 1 PB of Solid State Disk (SSD).

July 2023

Extention of the scratch disk to 100 PB based on a Clusterstor storage system with 8480 x 16TB Hard Disks. The usable capacity is 101.082 TB with 1 TB/s throughput. The connection with the compute nodes is based on HPE Slingshot interconnect.

Activation of the HPE Data Management Framework enabling the data movement between different storage tiers.

March 2023

Addition of a small staging system for the Cray Management System (CMS) composed by Master nodes, Storage Nodes, 5 Worker nodes, and 2 Compute nodes.

April 2021

CSCS, Hewlett Packard Enterprise and NVIDIA Announce World’s Most Powerful AI-Capable Supercomputer.

Read the press release >

October 2020

Installation  of the first cabinets and compute modules of the Alps Research Infrastructure. This phase comprises of 1'024 compute nodes based on the HPE Cray supercomputing architecture with Slingshot interconnect, and HPE ClusterStor storage system. Each node is equipped with two AMD EPYC(TM) 7742 64-Core processors. The scratch storage capacity is 10 PetaBytes.