Two manufacturers make modules at this exact specification. They match on every key parameter and are generally interchangeable: a buyer who needs "256 GB DDR5-6400 registered" can usually accept any of them.
| Manufacturer | Part number | CAS | OEM refs | Data |
|---|---|---|---|---|
| Samsung | M321RBJA0M22-CLP | — | Supermicro | ✓ verified |
| SK hynix | HMCT14MHERC | 60 | — | ✓ verified |
| SK hynix | HMCT14MHERC571N | 60 | — | ✓ verified |
Practical rule: servers accept these modules interchangeably in almost all cases. Keep one vendor within a memory bank and match existing modules when expanding, rather than mixing brands side by side.
Post a request for this spec and VAT-verified suppliers quote whichever brand they actually stock: Samsung or SK hynix. You choose from real offers.