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Designed without compromise by the Bull R&D teams
for High Performance Computing
to give you unlimited power to innovate

The bullx blade system was designed by Bull's Extreme Computing R&D team - Europe's largest team of experts in the field of high performance computing - with the following principles in mind:

bullx blades

bullx blades

  • Optimization and simplification of the compute node for HPC use
  • Integration of several compute nodes and first-level interconnect
  • Flexible structure for communication and I/O networks, for the closest fit with customer requirements

The bullx B520 compute blades - the third generation of bullx blades - were entirely re-designed to further optimize their compute performance and energy consumption, but they are fully compatible with the existing chassis. An existing B500-based system can therefore be upgraded on site, by simply replacing the previous blades by bullx B520 blades.

The bullx blade system leverages the latest technological advances such as:

  • New-generation Intel® Xeon® processors (E5-2600 v3 Family, code-named Haswell-EP), delivering ever more computing power
  • InfiniBand network connection through an integrated 36-ports FDR switch
  • Local storage on SSD

Thanks to these innovations, the bullx blade system delivers:

  • Improved performance (enhanced compute node efficiency, reduced latency, higher communication and I/O throughput)
  • Reduced cost of ownership (fewer components, better fit of communication network, reduced installation time, improved upgradeability, power efficiency)
  • Enhanced reliability (less cabling)

bullx blade chassis: high density, uncompromised performance and optimized power consumption



The bullx blade chassis can host up to 9 double compute blades, i.e. 18 compute nodes in 7U. It also contains the first-level interconnect, a management unit and all components necessary to power and cool the blades, interconnect and management unit. It is the ideal foundation to build a medium to large-scale HPC cluster, with bullx compute blades combined with service nodes of the bullx R423 family.

The bullx blade chassis provides a peak performance of up to above 18 Tflops and offers a fully non-blocking InfiniBand FDR interconnect.

An ultracapacitor (option) protects the chassis from power outages up to 250ms. In areas with good quality power supplies, the ultracapacitor means a UPS is not needed – saving up to 15% on power consumption.

The chassis is equipped with high-efficiency (+90%) power supply units, and power consumption is further optimized by the smart fan control in each chassis.

bullx B520 compute blade

bullx B510
bullx B510

The bullx B520 is a double-width blade including two compute nodes, so as to have some components in common, such as fans, to optimize energy consumption. Each node features:

  • 2 new-generation Intel® Xeon® processors E5-2600 v3 Family
  • Up to 256 GB DDR4 memory per node
  • 1 SATA SSD drive per node


bullx blade system
bullx blade system: technical specifications flyer

Ultra-concentrated and modular systems designed without compromise for unlimited innovation


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