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The prototypes described in this section are the ARM-based systems available to the Mont-Blanc partners and end-users to test our software and scientific applications on state-of-the-art ARM architectures.

Mont-Blanc 3 prototype: Dibona

As part of the Phase 3 of Mont-Blanc, a new prototype is built by Atos. It is named Dibona, after the Dibona peak in the French Alps, and it started operation in Fall 2017. It is based on 64 bit ThunderX2 processors from Cavium®, relying on the ARM® v8 instruction set.

The prototype leverages the BullSequana X1000 infrastructure, including Direct Liquid Cooling – cooling with warm water. Three compute nodes will be integrated side by side in each BullSequana X1000 blade.

The full configuration will ultimately include 48 computes nodes, ie. 96 Cavium® ThunderX2 CPUs, or 3000 cores.

Atos announced at ISC 2017 that the blade model developped for the Mont-Blanc prototype would be productized commercialized by Atos as part of its BullSequana X1000 range.


Mont-Blanc 1 prototype

8 nodes, each equipped with:

Documentation to access the Mont-Blanc prototype is available here.



Jetson TK1

8 nodes, each equipped with:

  • Nvidia Tegra K1 SoC
  • 4-Plus-1 quad-core ARM Cortex A-15 CPU (4x Cortex-A15 + 1x Cortex-A7)
  • Kepler GPU with 192 cores
  • 2 Gbyte memory with 64 bit width



  • CPU Cortex-A15 Quad @ 2 GHz
  • CPU Cortex-A7 Quad @ 1.4 GHz
  • CPU Mali-T628 MP6



24 nodes, each node is equiped with:

  • SoC Samsung Exynos 5 Octa 5410
  • CPU Cortex-A15@1.6GHz quad core and Cortex-A7@1.2GHz quad core
  • GPU PowerVR SGX544MP3 – No OpenCL support available
  • 2Gbyte LPDDR3 RAM PoP
  • 1 Gb Ethernet interconnection


70 nodes, each equiped with:

  • CPU Cortex-A9 Quad  @1.4 GHz
  • GPU Nvidia Tesla K20
  • 4 GB DDR3 RAM
  • 1 Gb Ethernet interconnection network
  • QDR Infiniband interconnection*

*IPoverIB only


3 nodes, each node is equipped with: