Named after Piz Daint, a prominent peak in Grisons that overlooks the Fuorn pass, this supercomputer is a hybrid Cray XC40/XC50 system and is the flagship system for national HPC Service.

Piz Daint has been updated in Fall 2016 and incorporates the previous Cray XC30 named Piz Daint & Piz Dora.

Read more about Piz Daint in the fact sheet "Piz Daint, one of the most powerful supercomputers in the world".


ModelCray XC40/XC50
XC50 Compute NodesIntel® Xeon® E5-2690 v3 @ 2.60GHz (12 cores, 64GB RAM) and NVIDIA® Tesla® P100 16GB
XC40 Compute NodesTwo Intel® Xeon® E5-2695 v4 @ 2.10GHz (2 x 18 cores, 64/128 GB RAM)
Login NodesIntel® Xeon® CPU E5-2650 v3 @ 2.30GHz (10 cores, 256 GB RAM)
Interconnect ConfigurationAries routing and communications ASIC, and Dragonfly network topology
Scratch capacity/scratch/snx3000 6.2 PB

Upgrade history

December 2012: Installation of Cray XC30 Piz Daint.

November 2013: Upgrade to a hybrid architecture and extension from 12 to 28 cabinets.

November 2016: Update of processors (CPU) and accelerators (GPU) and combination with the Piz Dora supercomputer > Cray XC40/XC50.


The system has Aries routing and communications ASIC, with Dragonfly network topology.

More information about the upgrade of Piz Daint