Samsung 64GB 3200MHz DDR4 PC4-25600 ECC Registered CL22 288-Pin DIMM 1.2V Dual Rank x4 Memory Module – M393A8G40AB2-CWEBQ

Samsung 64GB DDR4 3200MHz ECC Registered Server Memory — M393A8G40AB2-CWEBQ

The Samsung M393A8G40AB2-CWEBQ is a 64GB DDR4 ECC Registered (RDIMM) server memory module operating at 3200MHz (PC4-25600) with CAS latency CL22 and 1.2V operating voltage. This high-density 64GB module delivers maximum DDR4 memory capacity per slot at the highest DDR4 speed — making it ideal for memory-intensive enterprise workloads including large-scale virtualization, in-memory databases, and high-performance computing on DDR4 server platforms. Error-Correcting Code (ECC) technology continuously detects and corrects single-bit memory errors in real time, ensuring data integrity in mission-critical environments. The registered (buffered) design reduces electrical load on the memory controller, enabling stable high-density multi-DIMM configurations across enterprise server platforms.

Key Features

• 64GB High-Density DDR4: Maximum memory capacity per slot on DDR4 platforms — reduce DIMM count while achieving high total system memory
• 3200MHz — Fastest DDR4 Speed: PC4-25600 delivers the highest bandwidth available on DDR4 server platforms
• ECC Error Protection: Real-time single-bit error correction ensures data integrity for mission-critical server workloads
• Registered (Buffered) Design: Enables stable, high-density multi-DIMM server configurations without signal degradation
• Samsung DRAM: Industry-leading manufacturing quality with proven enterprise-grade reliability and longevity

Technical Specifications

• Part Number: M393A8G40AB2-CWEBQ
• Manufacturer: Samsung
• Memory Type: DDR4 SDRAM
• Module Type: RDIMM (Registered / Buffered)
• Capacity: 64GB
• Speed: 3200MHz (PC4-25600)
• CAS Latency: CL22
• Timing: 22-22-22
• Voltage: 1.2V
• Form Factor: 288-Pin DIMM
• Rank: Dual Rank (2Rx4)
• Die Organization: x4
• Data Width: 72-bit (64-bit + 8-bit ECC)
• Error Correction: SECDED (Single-bit correction, Double-bit detection)
• Operating Temperature: 0°C to 85°C

Use Cases

• Large-Scale Virtualization: VMware vSphere, Microsoft Hyper-V, and KVM deployments requiring maximum memory capacity per DDR4 server
• In-Memory Databases: MySQL, PostgreSQL, Microsoft SQL Server, and Oracle database workloads requiring large, fast memory pools
• General-Purpose HPC: Scientific computing and simulation workloads requiring high per-node memory capacity on DDR4 platforms
• Legacy Infrastructure Expansion: High-density memory upgrade for existing DDR4 server deployments

Compatibility

• Compatible with DDR4 RDIMM slots only — not compatible with DDR5 platforms
• CWEBQ suffix denotes specific OEM or regional server vendor qualification — verify against your server”s memory QVL before ordering
• Do not mix with DDR4 UDIMMs or LRDIMMs in the same system
• For multi-DIMM stability, populate channels with matched capacity, speed, and rank modules

Frequently Asked Questions

Is this module compatible with DDR5 servers?

No — DDR4 and DDR5 are not interchangeable. DDR4 RDIMMs require DDR4-compatible server platforms. Always verify your server”s memory type requirement before ordering.

What does the CWEBQ qualification suffix indicate?

Samsung uses qualification suffixes to denote OEM validation, regional certification, or specific server vendor testing. CWEBQ identifies this module”s exact qualification tier — always cross-reference with your server vendor”s memory compatibility or QVL list before purchase.

Can this module run at lower speeds if my server does not support 3200MHz?

DDR4 modules are backward speed-compatible — if your server platform does not support 3200MHz, the module will train down to the platform”s maximum supported speed (e.g., 2933MHz, 2666MHz). Always verify with your server vendor”s QVL to confirm supported configurations.

Whether you are maximizing per-server memory capacity for large-scale virtualization, accelerating in-memory database performance, or expanding a high-density DDR4 server infrastructure, the Samsung M393A8G40AB2-CWEBQ delivers the 64GB DDR4 3200MHz capacity, ECC protection, and Samsung manufacturing quality your enterprise server environment demands.