Hardware / Switches / Quantum-X800 Q3400

NVIDIA Quantum-X800 Q3400 InfiniBand switch

The XDR InfiniBand switch for 800G-per-GPU Blackwell Ultra clusters. 144 ports of 800G in one liquid-cooled chassis.

Ports
144 × 800G XDR
Throughput
115.2 Tb/s
Cooling
Liquid
Form factor
4U

Where it fits in the cluster

ConnectX-8 NIC800G opticsThis switchSpine

Compatible with

NICConnectX-8 SuperNICSERVERHGX B300

Common pitfalls

  • Liquid-cooled: the network rows need facility water, not just the GPU racks.
  • One switch replaces several 64-port boxes, which changes the fabric design. Plan topology with it, not around it.

Building with Quantum-X800 Q3400?

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.