Samsung 64GB DDR4 2933MHz ECC Registered Server Memory — M393A8G40MB2-CVFBQ

The Samsung M393A8G40MB2-CVFBQ is a 64GB DDR4 ECC Registered (RDIMM) server memory module operating at 2933MHz (PC4-23466) with CAS latency CL21 and 1.2V operating voltage. This high-density 64GB Dual Rank x4 module delivers reliable DDR4 memory bandwidth and capacity for the most demanding enterprise server workloads including large-scale virtualization, in-memory databases, and high-performance computing. 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-Capacity DDR4 RDIMM: High per-slot capacity for memory-intensive enterprise workloads
• 2933MHz DDR4 Performance: PC4-23466 delivers strong DDR4 memory bandwidth for enterprise server workloads
• 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: M393A8G40MB2-CVFBQ
• Manufacturer: Samsung
• Memory Type: DDR4 SDRAM
• Module Type: RDIMM (Registered / Buffered)
• Capacity: 64GB
• Speed: 2933MHz (PC4-23466)
• CAS Latency: CL21
• Timing: 21-21-21
• 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 high memory capacity per DDR4 server node
• In-Memory Databases: SAP HANA, Oracle TimesTen, and Redis clusters requiring large memory pools on DDR4 platforms
• HPC Clusters: MPI-based scientific computing requiring high per-node memory capacity on DDR4 platforms
• High-Density Infrastructure: Memory expansion for existing DDR4 server deployments requiring maximum capacity per slot

Compatibility

• Compatible with DDR4 RDIMM slots supporting 2933MHz — verify your platform's maximum supported DDR4 speed before ordering
• CVFBQ 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 CVFBQ qualification suffix indicate?

Samsung uses qualification suffixes to denote OEM validation, regional certification, or specific server vendor testing. CVFBQ 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 2666MHz if my server does not support 2933MHz?

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

Whether you are deploying large-scale DDR4 virtualization infrastructure, scaling in-memory database capacity, or expanding high-density server memory, the Samsung M393A8G40MB2-CVFBQ delivers the 64GB DDR4 2933MHz RDIMM performance, ECC protection, and Samsung manufacturing quality your enterprise server environment demands.