[ MANUFACTURER MODEL // MEMORY / RAM ]
Samsung M386A8K40BM1-CRC
Specific Samsung DDR4 ECC Load-Reduced DIMM (LRDIMM). This is a named manufacturer product or kit, not a general DDR standard overview. Specifications below are limited to information published for the model.
MODEL ID: Samsung M386A8K40BM1-CRC. Confirm the full model number, suffix, revision and SPD against the actual specimen before relying on compatibility or timing claims.
Model specifications
| Manufacturer / product | Samsung M386A8K40BM1-CRC |
|---|---|
| Product class | Specific Samsung DDR4 ECC Load-Reduced DIMM (LRDIMM) |
| Source-backed configuration | 64 GB DDR4-2400, 288-pin ECC LRDIMM; 4-rank x4 organization; 1.2 V per Samsung module datasheet. LRDIMM buffer architecture differs from a conventional RDIMM. CAS timing is omitted here because the exact value was not independently verified. |
| Platform compatibility | For server CPU/board platforms explicitly supporting DDR4 LRDIMMs. Do not mix with UDIMM/RDIMM unless the platform manual permits it; capacity and speed depend on ranks and population. |
| Variant boundaries | Only values cited for this exact SKU are stated. Unlisted timings, ranks, organization, or sub-revision differences must be checked against the specimen label, SPD and manufacturer data. |
Compatibility & service notes
- For server CPU/board platforms explicitly supporting DDR4 LRDIMMs. Do not mix with UDIMM/RDIMM unless the platform manual permits it; capacity and speed depend on ranks and population.
- Power down before removal, use ESD precautions, handle by the edges, and never force a memory module into a keyed socket.
- Identify ECC and buffering independently: ECC UDIMM, RDIMM, and LRDIMM have distinct platform support requirements. DDR5 on-die ECC is not system-level ECC.
- Check CPU/controller support, motherboard or server service manual, firmware, module capacity/density, slot population and supported data rate. Physical fit is not proof of compatibility.
Archival record fields
Retain exact suffix, revision, SPD and supported-server list. Confirm LRDIMM versus RDIMM before replacement; similar keyed modules are not necessarily compatible. Preserve label photographs, SPD data, full SKU, revision/date code, host configuration, BIOS/BMC version and test results. When installed, record slot and channel location.
Manufacturer & standards sources
- Samsung Semiconductor — M386A8K40BM1-CRCManufacturer source for the named product; use full part number and revision to verify the specimen.
- Samsung Semiconductor — DDR4 DRAM familyCurrent manufacturer family overview; the archived datasheet link above carries module-specific detail.
- JEDEC — DDR4 SDRAM standardGeneration-level electrical/interface context.
Manufacturer pages are the model-specific source; JEDEC pages define generation-level context. For a preserved machine, its vendor manual and validated memory support list take precedence over generic fit claims.