Why it matters, product
High bandwidth memory
Stacked DRAM dies bonded through-silicon vias and placed beside the accelerator die to supply bandwidth.
- Depends on
- 1
- Depended on by
- 1
- Metrics
- 0
Neighbourhood: what depends on it (left), what it depends on (right)
- Candidate
- Hypothesized
- Mechanism supported
- Causally supported
- Established relation
Systems that would feel a shortage
Downstream: what depends on it
AI accelerator requires input High bandwidth memory1 evidenceEstablished relation
AI accelerator depends on High bandwidth memory.
Mechanism
Current accelerators are packaged with stacks of high bandwidth memory beside the logic die to feed it at the bandwidth large models need; the JEDEC standard defines that interface.
Evidence
- documentJEDEC JESD238A, High Bandwidth Memory (HBM3) DRAMjedec.orgStacked DRAM interface standard used beside accelerator logic dies.checked 2026-09-07
- Status
- established_identity_or_engineering_relation
- Reviewer confidence
- 0.95
- Stated strength
- 0.90
- Lag
- not stated
- Version
- curated_seed_v1
- Reviewed
- 2026-09-07
Confidence and strength are curated judgements recorded with the edge, not measured quantities.
Inputs it cannot do without
Upstream: what it depends on
High bandwidth memory requires input Semiconductor fabrication plant2 evidenceEstablished relation
High bandwidth memory depends on Semiconductor fabrication plant.
Mechanism
HBM stacks are DRAM dies made in memory fabs, thinned and bonded through-silicon vias.
Evidence
- documentJEDEC JESD238A, High Bandwidth Memory (HBM3) DRAMjedec.orgStacked DRAM interface standard used beside accelerator logic dies.checked 2026-09-07
- documentNIST, CHIPS for Americanist.govFab construction, supply chain and workforce programme.checked 2026-09-07
- Status
- established_identity_or_engineering_relation
- Reviewer confidence
- 0.98
- Stated strength
- 1.00
- Lag
- not stated
- Version
- curated_seed_v1
- Reviewed
- 2026-09-07
Confidence and strength are curated judgements recorded with the edge, not measured quantities.
Measured, from the catalog
Linked metrics
No catalog metric is linked to this entity yet.
Named on the edges that depend on it
Substitutes
No substitute is named for this entity on any stored edge.
Derived from curated edges
Bottleneck centrality
- Score
- 2.48
- Downstream entities
- 4
- Direct dependents
- 1
Sum over every entity downstream (within six hops) of the strongest path weight to it, where each edge weighs its stated strength divided by one plus its named substitutes. A graph statistic over curated edges, not an observation. Computed 2026-09-07 22:42 UTC.
Curated paths this entity is part of
Chains
Names that resolve to this node
Aliases
- HBM
- HBM3
- HBM3E
- stacked DRAM
slug high-bandwidth-memory, updated 2026-09-07 22:42 UTC