Product Overview
The Samsung M386A8K40CM2-CTD is a 64GB DDR4 SDRAM memory module designed for compatible servers. It uses a 288-pin load-reduced DIMM (LRDIMM) format and operates at a rated data rate of 2666 MT/s. The module features ECC support, quad-rank x4 organization, and a nominal operating voltage of 1.2V.
Load-reduced memory uses memory-buffer technology to help server platforms support high-capacity memory configurations. This module is intended for systems specifically designed to support DDR4 LRDIMMs.
Key Features
- 64GB capacity: Supports high-capacity memory configurations in compatible servers.
- DDR4-2666 data rate: Rated for 2666 MT/s, classified as PC4-21300.
- Load-reduced DIMM design: Uses an LRDIMM architecture for supported server platforms.
- ECC support: Provides error-correction capability when supported by the server platform.
- Quad-rank x4 organization: Uses a 4Rx4 module configuration with 1.2V nominal operation.
Compatibility
This memory module is intended for compatible enterprise servers that support 288-pin DDR4 LRDIMMs. LRDIMMs are not interchangeable with registered DIMMs (RDIMMs) or unbuffered DIMMs (UDIMMs) unless the platform documentation explicitly supports the relevant module type. Verify the server model, processor generation, supported memory density, rank organization, and maximum memory speed before installation.
Typical Applications
- Enterprise and rack server memory expansion
- High-capacity server memory configurations
- Virtualization and general server workloads
- Replacement of a matching DDR4-2666 LRDIMM in a supported system
DC Supplies Product Note
Check the complete part number, M386A8K40CM2-CTD, against the server manufacturer's memory compatibility list before ordering. This is a 64GB ECC LRDIMM, not a standard desktop UDIMM or a conventional RDIMM. System compatibility and supported operating speed depend on the server platform and its memory configuration.
Technical Specifications
| Brand | Samsung |
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| Part Number / MPN | M386A8K40CM2-CTD |
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| Product Type | Server memory module |
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| Memory Capacity | 64GB |
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| Memory Technology | DDR4 SDRAM |
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| Rated Data Rate | 2666 MT/s |
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| Memory Standard | PC4-21300 |
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| Form Factor | LRDIMM (Load-Reduced DIMM) |
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| Pin Count | 288-pin |
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| Module Organization | 8G x72 |
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| Rank Organization | Quad-rank x4 (4Rx4) |
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| DRAM Component | 8Gb C-die, DDP package |
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| Error Correction | ECC |
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| Buffering | Load-reduced DIMM with memory buffer |
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| CAS Latency | CL19 at DDR4-2666 |
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| Nominal Operating Voltage | 1.2V |
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| Module Height | 31.25mm |
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Frequently Asked Questions
What is the capacity of this Samsung memory module?
The M386A8K40CM2-CTD has a capacity of 64GB.
Is this memory designed for desktop computers?
No. It is a server-oriented LRDIMM. Standard desktop motherboards generally require UDIMMs and are not compatible with this module.
Does this module support ECC?
Yes. It supports ECC, provided the server platform also supports and enables the relevant error-correction functionality.
Can this LRDIMM be installed alongside RDIMMs?
Do not assume that LRDIMMs and RDIMMs can be mixed. Follow the server manufacturer's memory population rules and supported module specifications.
What is the rated memory speed?
The module is rated for DDR4-2666, or 2666 MT/s. The actual operating speed depends on the server, processor, and installed memory configuration.
