AMD MI455X published HBM4 capacity per accelerator
432 GBobserved
| Value kind | observed — Reported measurements, counts, and specifications keep the precision and scope stated by their source; an exact specification is not treated as a range. |
|---|---|
| Scope | One MI455X accelerator, 12 HBM4 stacks. AMD lists peak bandwidth on the same page (23.3 TB/s, a separate claim). |
| As of | 2026-10 |
| Source | AMD MI455X product specifications (page lists a 2026-07-23 launch date; read 2026-10-19). · GPU Memory: Dedicated Memory Size, Dedicated Memory Type, Stacks of Memory. |
| Review | checking…review by 2026-12-08 · standard cadence |
| Recorded changes | last 2026-10-19 · 4 revisions tracked |
| Claim id | mi455x-hbm4-19-6-tb-s-per-gpu-helios-72-gpus-31 |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.