NVIDIA Spectrum-X Ethernet Platform

Fields

id

interconnect/nic-spectrumx-ethernet

Kind

ethernet

Version

Spectrum-X, up to 800GbE

Bandwidth (GB/s, per link, unidirectional)

100

Bandwidth basis

PER LANE, PER DIRECTION. 800 Gb/s = 100 GB/s per direction per port.

Topology

Leaf-spine Ethernet. Spectrum-X Multiplane scales to 128K GPUs in two tiers.

Scale-up

no

Scale-out

yes

Switching

Spectrum-X Ethernet switches (SN5000, SN6000) with Spectrum-X SuperNICs. RoCE acceleration, congestion management, crypto acceleration, programmable I/O. SONiC and Cumulus Linux NOS options.

notes

Spectrum-X is NVIDIA's purpose-built Ethernet platform for AI. Product page claims 1.6x network performance over off-the-shelf Ethernet and 95% efficiency at 100K+ GPU scale (vendor claims). Uses Spectrum-X SuperNICs (based on BlueField-3) for RoCE connectivity. Spectrum-XGS for cross-data-center connectivity with topology-aware congestion control. Multiplane enables flat two-tier topology up to 128K GPUs. Silicon photonics versions for power efficiency. The platform is the Ethernet alternative to InfiniBand for AI clusters.

way

each

Notes

Spectrum-X is NVIDIA's purpose-built Ethernet platform for AI. Product page claims 1.6x network performance over off-the-shelf Ethernet and 95% efficiency at 100K+ GPU scale (vendor claims). Uses Spectrum-X SuperNICs (based on BlueField-3) for RoCE connectivity. Spectrum-XGS for cross-data-center connectivity with topology-aware congestion control. Multiplane enables flat two-tier topology up to 128K GPUs. Silicon photonics versions for power efficiency. The platform is the Ethernet alternative to InfiniBand for AI clusters.

Cross-references

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