HBM tracker / memory register

HBM stack-height timeline

HBM went from four DRAM layers in 2014 to sixteen-layer samples in 2026. Every point is a dated maker milestone, from first samples to volume production, and links to its source.

Published stack-height milestonesDRAM layers against the date of each record’s status evidence. Circles are production reports, squares are historical catalogs or demonstrations, triangles are samples or plans. Each point links to a record; the full list follows. 2H4H8H12H16H 20132015201720192021202320252027 Micron HBM3E 24GB — 2024-02-26 — Production reportedMicron HBM3E 36GB — 2025-06-25 — Production reportedMicron HBM4 36GB — 2026-03-16 — Production reportedMicron HBM4 48GB — 2026-03-16 — SamplingSamsung 12-layer TSV · 24GB — 2019-10-07 — DemonstratedSamsung Aquabolt 8GB — 2018-01-11 — Production reportedSamsung Flashbolt 16GB — 2020-02-04 — PlannedSamsung HBM2 4GB · first generation — 2016-01-19 — Production reportedSamsung HBM2 8GB · first generation — 2017-07-18 — Production reportedSamsung HBM3 16GB — 2023-10-21 — Production reportedSamsung HBM3 24GB — 2023-10-21 — Production reportedSamsung HBM4 24GB, Samsung HBM4 36GB — 2026-02-12 — Production reportedSamsung HBM4 48GB — 2026-02-12 — PlannedSamsung HBM4E 32GB — 2026-05-29 — PlannedSamsung HBM4E 48GB — 2026-05-29 — SamplingSamsung HBM4E 64GB — 2026-05-29 — PlannedSK hynix HBM · 4-high — 2014 — Historical catalogSK hynix HBM2 2GB · 1 Gb/s, SK hynix HBM2 2GB · 1.6 Gb/s, SK hynix HBM2 2GB · 2 Gb/s — 2016-08 — Historical catalogSK hynix HBM2 4GB · 1 Gb/s, SK hynix HBM2 4GB · 1.6 Gb/s, SK hynix HBM2 4GB · 2 Gb/s — 2016-08 — Historical catalogSK hynix HBM2 8GB · 1 Gb/s, SK hynix HBM2 8GB · 1.6 Gb/s, SK hynix HBM2 8GB · 2 Gb/s — 2016-08 — Historical catalogSK hynix HBM2E 16GB — 2020-07-02 — Production reportedSK hynix HBM3 16GB — 2022-06-08 — Production reportedSK hynix HBM3 24GB — 2023-04-20 — SamplingSK hynix HBM3E 24GB — 2024-03-19 — Production reportedSK hynix HBM3E 36GB — 2024-09-26 — Production reportedSK hynix HBM3E 48GB — 2025-01-10 — DemonstratedSK hynix HBM4 36GB — 2025-10-29 — Family production reportedSK hynix HBM4 48GB — 2026-01-05 — DemonstratedSK hynix HBM4E 48GB — 2026-06-18 — Sampling DRAM layers (base die excluded)

Circle: production reported. Square: historical catalog or demonstration. Triangle: sample or plan. Fill shows the maker: solid teal SK hynix, dark ink Samsung, open Micron. Shared capacity/speed milestones share a point. This chart is generated at build time; the complete accessible record list is below. Date rules.

Dated evidence

  1. SK hynix HBM · 4-high
    2014 · 4H · Historical catalog
  2. Samsung HBM2 4GB · first generation
    2016-01-19 · 4H · Production reported
  3. SK hynix HBM2 2GB · 1 Gb/s
    2016-08 · 2H · Historical catalog
  4. SK hynix HBM2 2GB · 1.6 Gb/s
    2016-08 · 2H · Historical catalog
  5. SK hynix HBM2 2GB · 2 Gb/s
    2016-08 · 2H · Historical catalog
  6. SK hynix HBM2 4GB · 1 Gb/s
    2016-08 · 4H · Historical catalog
  7. SK hynix HBM2 4GB · 1.6 Gb/s
    2016-08 · 4H · Historical catalog
  8. SK hynix HBM2 4GB · 2 Gb/s
    2016-08 · 4H · Historical catalog
  9. SK hynix HBM2 8GB · 1 Gb/s
    2016-08 · 8H · Historical catalog
  10. SK hynix HBM2 8GB · 1.6 Gb/s
    2016-08 · 8H · Historical catalog
  11. SK hynix HBM2 8GB · 2 Gb/s
    2016-08 · 8H · Historical catalog
  12. Samsung HBM2 8GB · first generation
    2017-07-18 · 8H · Production reported
  13. Samsung Aquabolt 8GB
    2018-01-11 · 8H · Production reported
  14. Samsung 12-layer TSV · 24GB
    2019-10-07 · 12H · Demonstrated
  15. Samsung Flashbolt 16GB
    2020-02-04 · 8H · Planned
  16. SK hynix HBM2E 16GB
    2020-07-02 · 8H · Production reported
  17. SK hynix HBM3 16GB
    2022-06-08 · 8H · Production reported
  18. SK hynix HBM3 24GB
    2023-04-20 · 12H · Sampling
  19. Samsung HBM3 16GB
    2023-10-21 · 8H · Production reported
  20. Samsung HBM3 24GB
    2023-10-21 · 12H · Production reported
  21. Micron HBM3E 24GB
    2024-02-26 · 8H · Production reported
  22. SK hynix HBM3E 24GB
    2024-03-19 · 8H · Production reported
  23. SK hynix HBM3E 36GB
    2024-09-26 · 12H · Production reported
  24. SK hynix HBM3E 48GB
    2025-01-10 · 16H · Demonstrated
  25. Micron HBM3E 36GB
    2025-06-25 · 12H · Production reported
  26. SK hynix HBM4 36GB
    2025-10-29 · 12H · Family production reported
  27. SK hynix HBM4 48GB
    2026-01-05 · 16H · Demonstrated
  28. Samsung HBM4 24GB
    2026-02-12 · 12H · Production reported
  29. Samsung HBM4 36GB
    2026-02-12 · 12H · Production reported
  30. Samsung HBM4 48GB
    2026-02-12 · 16H · Planned
  31. Micron HBM4 36GB
    2026-03-16 · 12H · Production reported
  32. Micron HBM4 48GB
    2026-03-16 · 16H · Sampling
  33. Samsung HBM4E 32GB
    2026-05-29 · 8H · Planned
  34. Samsung HBM4E 48GB
    2026-05-29 · 12H · Sampling
  35. Samsung HBM4E 64GB
    2026-05-29 · 16H · Planned
  36. SK hynix HBM4E 48GB
    2026-06-18 · 12H · Sampling

Catalog entries without a milestone date

A current catalog entry does not establish when a specific variant first shipped. These parts are excluded from the chart.