Spectrum-X Photonics and Quantum-X Photonics are NVIDIA’s lines of network switches that implement co-packaged optics. They were debuted at GTC25 and will come in two flavors: Ethernet and InfiniBand.

Quantum-X800 (Q3400-RA)

Quantum-X800 (Q3400-RA) is NVIDIA’s 144-port XDR InfiniBand switch with pluggable optics. The datasheet is here: Q3200-RA/Q3400-RA XDR 800Gb/s InfiniBand Switch Systems User Manual

Quantum-X Photonics (Q3450-LD)

NVIDIA will release their InfiniBand switch, Quantum-X Photonics, first in 2H2025. It will support 144 ports of 800G XDR InfiniBand using a 200G serdes.1

NVIDIA had a Quantum-X Photonics switch on display at GTC25:

Spectrum-X Photonics

NVIDIA’s Ethernet switch, Spectrum-X Photonics, will ship in 2025. There will be two switch variants:1

  • 128x 800G or 512x 200G
  • 512x 800G or 2048x 200G

Footnotes

  1. NVIDIA Announces Spectrum-X Photonics, Co-Packaged Optics Networking Switches to Scale AI Factories to Millions of GPUs (nvidia.com) 2