Samsung 8GB DDR4 2666MHz UDIMM ECC 1Rx8

Samsung 8GB DDR4 2666MHz UDIMM ECC 1Rx8

Brand: Samsung | Category: Memory (RAM)

SKU: M391A1K43DB2-CWE | Part #: M391A1K43DB2-CWE | MPN: M391A1K43DB2-CWE

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About the Samsung 8GB DDR4 2666MHz UDIMM ECC 1Rx8

The Samsung 8GB DDR4 2666MHz UDIMM ECC 1Rx8 (M391A1K43DB2-CWE) is a server-grade unbuffered ECC memory module engineered on Samsung's advanced 10nm-class DRAM fabrication process. Operating at a rated speed of DDR4-2666 (PC4-21300) with CL19 latency timings, this single-rank, x8 organization module delivers reliable high-bandwidth memory access for platforms requiring error detection and correction without the added latency overhead of fully buffered or registered designs. The ECC function continuously scrubs and corrects single-bit memory errors in real time, a critical requirement for data integrity in production server and workstation environments.

As a UDIMM form factor, the M391A1K43DB2-CWE is specifically suited to entry-level and mid-range server platforms, professional workstations, and edge computing nodes that support unbuffered ECC memory — a common configuration in Intel Xeon E-series and select AMD EPYC embedded platform designs. The module operates at 1.2V nominal, aligning with DDR4 energy-efficiency standards and contributing to reduced thermal output in dense rack deployments. Samsung's on-die ECC cell architecture further enhances intrinsic reliability at the silicon level before system-level ECC correction is applied.

For enterprise IT procurement teams serving datacenter, AI inference edge, telecommunications infrastructure, and industrial computing workloads across the UAE, GCC, EMEA, and APAC regions, Omnixon Global maintains stock of this module to support fleet-scale deployments. The M391A1K43DB2-CWE carries Samsung's commercial-grade quality binning and is manufactured to JEDEC DDR4 standards, ensuring broad platform compatibility and long-term supply consistency for lifecycle-managed infrastructure programs.

Ideal for

  • Entry-level rack servers running virtualization stacks such as VMware ESXi or Microsoft Hyper-V, where ECC protection prevents silent data corruption across multiple guest workloads
  • Professional CAD and EDA workstations requiring unbuffered ECC memory to maintain computational integrity during long-running simulation and rendering jobs
  • Edge AI inference nodes and industrial IoT gateways where compact unbuffered ECC modules enable reliable 24/7 operation in space- and power-constrained deployments
  • Network-attached storage (NAS) and software-defined storage appliances on platforms such as TrueNAS or Proxmox, where ECC is essential to protect ZFS write caches and metadata integrity
  • Telecommunications and carrier infrastructure servers requiring memory with error correction to meet five-nines availability targets in unattended remote locations
  • Enterprise desktop-replacement workstations and thin provisioning servers in regulated industries — finance, healthcare, government — where data fidelity is a compliance requirement

Technical specifications

ManufacturerSamsung
Manufacturer Part NumberM391A1K43DB2-CWE
Memory Capacity8GB
Memory TechnologyDDR4 SDRAM
Form FactorUDIMM (Unbuffered DIMM)
Speed GradeDDR4-2666 (PC4-21300)
ECCYes — Single-bit error correction, double-bit error detection (SECDED)
Rank Configuration1Rx8 (Single Rank, x8 Organization)
Number of ICs8
Operating Voltage1.2V
CAS Latency (CL)19
Timing19-19-19
Pin Count288-pin
Module Width64-bit (72-bit with ECC)
Data Transfer Rate21,300 MB/s (peak theoretical)
Operating Temperature0°C to 85°C
JEDEC ComplianceJEDEC DDR4 Standard
On-Die ECCYes (Samsung 10nm-class process)
RoHS ComplianceYes

Available from Omnixon Global. Submit an RFQ and our team will confirm configuration and availability for your order.

Technical Specifications

BrandSamsung
CategoryMemory (RAM)
SKUM391A1K43DB2-CWE
Part NumberM391A1K43DB2-CWE
ConditionNew
Manufacturer Part NumberM391A1K43DB2-CWE
Memory Capacity8GB
Memory TechnologyDDR4 SDRAM
Form FactorUDIMM (Unbuffered DIMM)
Speed GradeDDR4-2666 (PC4-21300)
ECCYes — Single-bit error correction, double-bit error detection (SECDED)
Rank Configuration1Rx8 (Single Rank, x8 Organization)
Number of ICs8
Operating Voltage1.2V
CAS Latency (CL)19
Timing19-19-19
Pin Count288-pin
Module Width64-bit (72-bit with ECC)
Data Transfer Rate21,300 MB/s (peak theoretical)
Operating Temperature0°C to 85°C
JEDEC ComplianceJEDEC DDR4 Standard
On-Die ECCYes (Samsung 10nm-class process)
RoHS ComplianceYes

Frequently Asked Questions about Samsung 8GB DDR4 2666MHz UDIMM ECC 1Rx8

Is the Samsung 8GB DDR4 2666MHz UDIMM ECC 1Rx8 compatible with my server?

Part number M391A1K43DB2-CWE is qualified for Samsung servers that list compatible memory in their QVL. We verify QVL match before quoting — share your server model in the RFQ and our pre-sales engineers confirm fit, recommended population pattern, and total capacity supported.

What support applies to this memory module?

Full manufacturer support (typically 3 years, RDIMM/LRDIMM SKUs often lifetime against manufacturing defects). All product is sourced through distribution so support registers cleanly under your company name.

How do I request a quote?

Submit the RFQ form on this page with your quantity and destination country. Our pre-sales team responds with a vendor-confirmed quote, availability, and matching server-QVL confirmation if needed.