Why it matters

NVLink powers intra-node parallelism. 10x+ faster than PCIe.

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The architecture

Point-to-point 900 GB/s H100.

NVSwitch all-to-all.

Coherent memory.

NVLink interconnectPoint-to-point900 GB/s H100NVSwitchall-to-allCoherentunified memoryH100 SXM: NVLink 4 = 900 GB/s; NVSwitch enables full mesh
NVLink interconnect.
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How it works end to end

H100 900 GB/s.

NVSwitch all-to-all.

Coherent memory.