Hardware / Switches / Quantum-2 QM9700

NVIDIA Quantum-2 QM9700 InfiniBand switch

The NDR InfiniBand leaf and spine switch behind most Hopper training clusters. 64 ports of 400G in a 1U box.

Ports
64 × 400G NDR
Cages
32 × OSFP (twin-port)
Throughput
51.2 Tb/s
Form factor
1U

Where it fits in the cluster

GPU server NICOpticsThis switch (leaf)Spine

Compatible with

OPTIC800G OSFP 2×DR4NICConnectX-7

Common pitfalls

  • Port counts are quoted in 400G ports; each OSFP cage carries two.
  • Plan a subnet manager (on-switch or UFM) as part of the build, not after.

Building with Quantum-2 QM9700?

Send us the cluster spec. We source the full bill of materials, and can finance it.

Start a buildExplore financing

Specs from vendor datasheets. Confirm configuration with your supplier before ordering.