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Samsung M393A2K40CB2-CTD

Specific Samsung DDR4 ECC Registered server DIMM. This is a named manufacturer product or kit, not a general DDR standard overview. Specifications below are limited to information published for the model.

Locally stored schematic of Samsung M393A2K40CB2-CTD; not to scale or a product photograph
UNIQUE LOCAL SVG // REFERENCE SCHEMATIC, NOT TO SCALE

MODEL ID: Samsung M393A2K40CB2-CTD. Confirm the full model number, suffix, revision and SPD against the actual specimen before relying on compatibility or timing claims.

Model specifications

Manufacturer / productSamsung M393A2K40CB2-CTD
Product classSpecific Samsung DDR4 ECC Registered server DIMM
Source-backed configuration16 GB DDR4-2666, 288-pin ECC Registered DIMM (RDIMM); CL19; 1.2 V per Samsung product specification. Confirm revision and organization from label/SPD.
Platform compatibilityFor platforms explicitly supporting DDR4 RDIMMs of this capacity and organization. RDIMMs generally cannot be mixed with UDIMMs or LRDIMMs in a channel; server rules govern speed.
Variant boundariesOnly 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 platforms explicitly supporting DDR4 RDIMMs of this capacity and organization. RDIMMs generally cannot be mixed with UDIMMs or LRDIMMs in a channel; server rules govern speed.
  • 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 the Samsung label, suffix/revision, SPD, server model/CPU, firmware and slot location. Validate ECC reporting through platform diagnostics. 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

  1. Samsung M393A2K40CB2-CTD datasheet (archived mirror)Manufacturer source for the named product; use full part number and revision to verify the specimen.
  2. Samsung Semiconductor — DDR4 DRAM familyCurrent manufacturer family overview; exact model specifications are linked to an archived copy of the Samsung datasheet above.
  3. 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.