SemiAnalysis: HBM Stacking Trend Reverses Toward 8-hi

SemiAnalysis argues the HBM stacking trend is reversing: next-gen accelerators will shift from 12-hi to 8-hi stacks, with Nvidia Rubin Ultra dropping to 8-hi 192GB, as fewer dies at the same bandwidth lowers inference costs.

2026-09-14 ~ 2026-09-15 · 2 related posts

• SemiAnalysis: 4-hi HBM wins on $/bandwidth, cutting inference cost amid DRAM shortage — dylan522p · 2026-09-14

1 near-duplicate retellings: maksym_andr