Brand: Samsung | Category: Memory (RAM)
SKU: M391A1K43DB2-CWE | Part #: M391A1K43DB2-CWE | MPN: M391A1K43DB2-CWE
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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.
| Manufacturer | Samsung |
| Manufacturer Part Number | M391A1K43DB2-CWE |
| Memory Capacity | 8GB |
| Memory Technology | DDR4 SDRAM |
| Form Factor | UDIMM (Unbuffered DIMM) |
| Speed Grade | DDR4-2666 (PC4-21300) |
| ECC | Yes — Single-bit error correction, double-bit error detection (SECDED) |
| Rank Configuration | 1Rx8 (Single Rank, x8 Organization) |
| Number of ICs | 8 |
| Operating Voltage | 1.2V |
| CAS Latency (CL) | 19 |
| Timing | 19-19-19 |
| Pin Count | 288-pin |
| Module Width | 64-bit (72-bit with ECC) |
| Data Transfer Rate | 21,300 MB/s (peak theoretical) |
| Operating Temperature | 0°C to 85°C |
| JEDEC Compliance | JEDEC DDR4 Standard |
| On-Die ECC | Yes (Samsung 10nm-class process) |
| RoHS Compliance | Yes |
Available from Omnixon Global. Submit an RFQ and our team will confirm configuration and availability for your order.
| Brand | Samsung |
| Category | Memory (RAM) |
| SKU | M391A1K43DB2-CWE |
| Part Number | M391A1K43DB2-CWE |
| Condition | New |
| Manufacturer Part Number | M391A1K43DB2-CWE |
| Memory Capacity | 8GB |
| Memory Technology | DDR4 SDRAM |
| Form Factor | UDIMM (Unbuffered DIMM) |
| Speed Grade | DDR4-2666 (PC4-21300) |
| ECC | Yes — Single-bit error correction, double-bit error detection (SECDED) |
| Rank Configuration | 1Rx8 (Single Rank, x8 Organization) |
| Number of ICs | 8 |
| Operating Voltage | 1.2V |
| CAS Latency (CL) | 19 |
| Timing | 19-19-19 |
| Pin Count | 288-pin |
| Module Width | 64-bit (72-bit with ECC) |
| Data Transfer Rate | 21,300 MB/s (peak theoretical) |
| Operating Temperature | 0°C to 85°C |
| JEDEC Compliance | JEDEC DDR4 Standard |
| On-Die ECC | Yes (Samsung 10nm-class process) |
| RoHS Compliance | Yes |
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.
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.
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.