Abstract: Modular electronic card to support and manage a plurality of calculation nodes and their interconnections with a three-dimensional topology, wherein each node includes a card carrying at least a processing unit, a memory battery and connection members with the modular card. The modular electronic card has a spatial density of the calculation nodes equal, on the surface, to at least 0.8 nodes per square decimeter, given a node that has at least 108 differential connections divided into 12 independent groups, two for each of the fundamental directions (x, y, z) of the 3D topology.