Two manufacturers make modules at this exact specification. They match on every key parameter and are generally interchangeable: a buyer who needs "16 GB DDR4-2133 UDIMM" can usually accept any of them.
| Manufacturer | Part number | CAS | OEM refs | Data |
|---|---|---|---|---|
| Samsung | M391A2K43BB1-CPBQ | — | — | ✓ verified |
| SK hynix | HMA82GU7MFR8N-TF | — | — | specs |
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.