Two manufacturers make modules at this exact specification. They match on every key parameter and are generally interchangeable: a buyer who needs "64 GB DDR4-2666 registered" can usually accept any of them.
| Manufacturer | Part number | CAS | OEM refs | Data |
|---|---|---|---|---|
| Kingston | KSM26RD4/64HAR | 19 | — | ✓ verified |
| Kingston | KSM26RD4/64HCR | 19 | — | ✓ verified |
| Kingston | KSM26RD4/64MER | 19 | — | ✓ verified |
| Kingston | KSM26RD4/64MFR | 19 | — | ✓ verified |
| Samsung | M393A8G40MB2-CTD | 19 | HPE | ✓ verified |
| Samsung | M393A8G40MB2-CTD7Q | 19 | — | ✓ 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: Kingston or Samsung. You choose from real offers.