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Oracle announced that Vera Rubin NVL72 is now generally available on the OCI cloud platform. Sina Tech reported on November 3, 2026 that NVIDIA's Rubin shipping specifications updated in September show that the per-GPU NVFP4 inference compute of 50 PFLOPS, training compute of 35 PFLOPS, and 288GB HBM4 memory remain unchanged, while memory bandwidth dropped from 22TB/s to 19.2TB/s, NVLink dropped from 3.6TB/s to 3.0TB/s, and external network bandwidth rose from 400GB/s to 450GB/s; the rack-level NVL72 was adjusted proportionally in tandem, with total memory bandwidth dropping from 1580TB/s to 1400TB/s and external networking rising from 28.8TB/s to 32.4TB/s. The report said the new specifications apply to all Rubin hardware from the first day of shipment, and NVIDIA did not explain the reason for the reductions.
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NVIDIA Rubin Shipping Specs Adjusted: Memory Bandwidth Down 11%, External Network Up 12.5%Developments
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Nov 3
Sina Tech
NVIDIA Rubin Shipping Specs Adjusted: Memory Bandwidth Down 11%, External Network Up 12.5%
NVIDIA's September update to the Rubin shipping specs shows that the per-GPU NVFP4 inference compute of 50 PFLOPS, training of 35 PFLOPS, and 288GB HBM4 memory remain unchanged, while memory bandwidth drops from 22TB/s to 19.2TB/s, NVLink drops from 3.6TB/s to 3.0TB/s, and external network bandwidth rises from 400GB/s to 450GB/s. The rack-level NVL72 is adjusted proportionally in tandem, with total memory bandwidth dropping from 1580TB/s to 1400TB/s and external networking rising from 28.8TB/s to 32.4TB/s; the eight-GPU HGX NVL8 changes the most, with memory dropping from 2.3TB to 2.0TB, a 26% reduction in total bandwidth. The article states that the new specs apply to all Rubin hardware from the first day of shipment; NVIDIA did not explain the reason for the downgrade, and the author believes this is a system-level rebalancing in response to heavier cross-rack communication.