NVHBM is not a memory revolution; Nvidia seeks to platformize cHBM, dominate custom AI architectures

DIGITIMESSeptember 16, 2026en

DIGITIMES observed that Nvidia's newly announced NVHBM is not a brand-new memory technology, but rather an extension of existing custom HBM (cHBM). It is a managed cHBM design that moves the memory controller, which originally sat on the XPU, into the HBM logic base die, and pairs it with custom physical-layer (PHY) and die-to-die (D2D) interfaces. In strategic terms, Nvidia is extending its moat from GPUs to the memory architecture of custom ASICs, and is trying to define how future custom AI chips connect to memory, hook into scale-up networks, and come together as complete AI racks.

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