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Nvidia trims HBM4 bandwidth for Rubin platform, sources say
What happened
Nvidia is reportedly adjusting the fourth-generation high-bandwidth memory (HBM4) specification for its Vera Rubin NVL72 platform, cutting bandwidth per GPU from the previously announced 22TB/s to 19.2TB/s, a reduction of about 13%. South Korean industry observers said the move could increase supply flexibility and help balance performance with mass-production delivery; the source does not state the cause, and the actual impact of the change on supplier orders remains unconfirmed.
Impact and signal
Medium impactImpact score: 55/100
Affected components and suppliers
HBM4
HBM4specification_changebandwidthNvidiaVera Rubin NVL72
Source and time
Source: DigiTimes Asia · 10/28/2026 · View original source
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