Technical Snapshot

The Samsung DDR4-3200 ECC Registered 128GB LRDIMM — M386AAG40AM3-CWE is a server-grade DDR4 LRDIMM memory module designed for enterprise servers and workstations. Running at 3,200 MT/s with CL22 timings at 1.2V, The module provides 128GB of DDR4 memory . this module targets server deployments, virtualization hosts, and high-availability computing environments requiring ECC error correction.

Use Case
Server deployments, virtualization, high-availability computing
Compatibility
LRDIMM-compatible server motherboard
Category
DDR4 LRDIMM — Samsung
Samsung DDR4-3200 ECC Registered 128GB LRDIMM — M386AAG40AM3-CWE
Samsung RAM
Samsung

DDR4-3200 ECC Registered 128GB LRDIMM — M386AAG40AM3-CWE

DDR4 · LRDIMM · 3,200 MT/s · 128GB

Memory transfer rate in megatransfers per second. Higher MT/s provides more bandwidth for CPU-bound workloads.
Speed 3,200 MT/s
Total kit capacity across all modules. Dual-channel kits double memory bandwidth.
Capacity 128GB
CAS Latency — the delay between a memory access request and data availability.
Latency CL22
Operating voltage. Higher voltage allows faster speeds but increases power and heat.
Voltage 1.2V
MPNM386AAG40AM3-CWE
EAN4260751590663
CategoryMemory
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Memory Specifications

Memory TypeDDR4
Form FactorLRDIMM
Total Capacity128GB
Speed3,200 MT/s
CAS LatencyCL22
Voltage1.2V
ECCYes
RegisteredYes

Full Specifications

Data sourced from Samsung product specifications
Memory
Memory TypeDDR4
Form FactorLRDIMM
Total Capacity128GB
Module Count1
Module Capacity128GB
Speed3,200 MT/s
Timings & Voltage
CAS LatencyCL22
Voltage1.2V
ECCYes
RegisteredYes
Product
BrandSamsung
MPNM386AAG40AM3-CWE
EAN4260751590663
Physical
Weight0.050 kg
Package Dimensions45.72 x 35.56 x 35.56 cm

Support

Samsung Memory Compatibility ToolCheck motherboard compatibility for this module
Samsung Support →
Samsung DDR4-3200 ECC Registered 128GB LRDIMM — M386AAG40AM3-CWE DatasheetPDF · Technical specifications
Samsung Support →
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Frequently Asked Questions

What motherboards are compatible with this memory?

The Samsung DDR4-3200 ECC Registered 128GB LRDIMM — M386AAG40AM3-CWE requires a DDR4-compatible motherboard. Compatible platforms include AMD AM4 (B550, X570, B450, etc.) and Intel LGA 1700 (B660, Z690) or LGA 1200 (B560, Z590). DDR4 is NOT compatible with DDR5 slots — they use different pin configurations.

What speed does this memory run at?

The Samsung DDR4-3200 ECC Registered 128GB LRDIMM — M386AAG40AM3-CWE runs at 3,200 MT/s with CL22 timings. This is a JEDEC standard speed that works automatically without BIOS configuration.

Can I add more memory later?

Yes, the Samsung DDR4-3200 ECC Registered 128GB LRDIMM — M386AAG40AM3-CWE is a single 128GB module. You can add additional compatible DDR4 LRDIMM modules to populate empty slots. For best performance, use matched modules of the same speed and capacity to enable dual-channel mode.

Does this memory support ECC error correction?

Yes, the Samsung DDR4-3200 ECC Registered 128GB LRDIMM — M386AAG40AM3-CWE includes ECC (Error-Correcting Code) support, which detects and corrects single-bit memory errors. This is essential for servers, workstations, and mission-critical applications where data integrity is paramount.

Where can I find technical support?

Visit the Samsung support website for compatibility tools, firmware updates, and technical documentation for the Samsung DDR4-3200 ECC Registered 128GB LRDIMM — M386AAG40AM3-CWE.

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MPN: M386AAG40AM3-CWE
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