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 - 5320 Nodes
XC40 Compute NodesTwo Intel® Xeon® E5-2695 v4 @ 2.10GHz (2 x 18 cores, 64/128 GB RAM) - 1813 Nodes
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 capacity6.2 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 (More information about the upgrade of Piz Daint).


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