// AI news · 2026-11-01 · ServeTheHome
NVIDIA Updates Rubin GPU Specs and Ships First Hardware
NVIDIA has updated Rubin GPU specifications for production, reducing HBM4 memory bandwidth from 22TB/s to 19.2TB/s and NVLink from 3.6TB/s to 3.0TB/s, while increasing scale-out network bandwidth to 450GB/s.
Published 2026-11-01 11:00 (Beijing time)Source ServeTheHomeAuto-summarised, fact-checked against source
01Summary
These changes affect the NVL72 rack system, lowering its total GPU memory bandwidth by 11%. Theoretical compute performance remains unchanged at 50 PFLOPS (FP4 inference) and 35 PFLOPS (FP4 training).
Summarised from the original article by an open-source model, then checked automatically: every number and English name must appear in the source. The original article is authoritative.
02Key points
- HBM4 memory bandwidth reduced from 22TB/s to 19.2TB/s.
- NVLink bandwidth cut from 3.6TB/s to 3.0TB/s.
- Scale-out network bandwidth increased to 450GB/s.
- NVL72 rack total GPU memory bandwidth down by 11%.
03Source
NVIDIA Updates Rubin GPU Specs as First Production Hardware Arrives
ServeTheHome · published 2026-11-01 11:00 Beijing time
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