Silicon AnalyticaGlossary · Memory
What is HBM (high-bandwidth memory)?
High-bandwidth memory (HBM) is a type of DRAM made by stacking several memory dies vertically and connecting them with through-silicon vias, then placing the stack next to a processor in the same package. It transfers data much faster than conventional memory modules.
Why it matters for investors
AI accelerators need to move very large amounts of data, so HBM has become a key component of AI servers. Few memory makers produce it, and qualification for each new accelerator generation matters.
HBM uses more wafer capacity per bit than standard DRAM, so its growth can tighten supply of other memory products. Memory makers often discuss HBM separately from other DRAM in their results.
Key companies
Related terms
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General educational explanation. Information only, not investment advice.