Generic Generic HGX 8-GPU node
8 × Unspecified GPU per node, with 8 compute rails at 400G. That is 3.2 Tb/s of scale-out network per node.
- GPUs per node8 × Unspecified GPU
- Compute rails8 × 400G
- Scale-out bandwidth3.2 Tb/s
- Storage links2 × 200G
- In-band links1 × 100G
- BMC ports1
- Rack units8U
- Typical power10 kW
- Maximum power12 kW
What this means for the fabric
8 compute NICs means 8 rails. In a rail-optimized design each of those rails is sized on its own against the node count, then multiplied back up, so the leaf tier is driven by the rail count and not by the total endpoint count.
Storage and in-band management are separate fabrics with their own switches and their own optics, and the 1 BMC port per node feed the out-of-band network, which also has to carry every switch and every PDU in the cluster.
Power and racks
At 10 kW typical draw, this node fills a rack's power budget long before it fills the space. A 45 kW rack takes 4 of them on power alone, against 5 on rack units. Power is what actually sets the rack count.
Notes
Edit every field to match your actual server. nodesPerRack is null here, so rack density is derived from the power and RU budget rather than fixed.
Source: Neutral starting point for a custom build. Placeholder