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. Published HBM4 capacity only; HBM bandwidth requires the selected OEM schedule because AMD product and Helios pages disagree. |
| As of | 2026 |
| Source | AMD — undated MI455X product specifications; the listed launch date does not date the specification. · GPU Memory: Dedicated Memory Size and Dedicated Memory Type. |
| Review | checking…review by 2026-12-08 · standard cadence |
| Recorded changes | last 2026-09-16 · 2 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.