Samsung 16GB DDR4 2133MHz ECC Registered Server Memory — M393A2G40DB0-CPB2Q

The Samsung M393A2G40DB0-CPB2Q is a 16GB DDR4 ECC Registered (RDIMM) server memory module operating at 2133MHz (PC4-17000) with CAS latency CL15 and 1.2V operating voltage. A proven workhorse of enterprise server infrastructure, this module delivers reliable memory bandwidth and capacity for a wide range of server workloads including virtualization, databases, and general-purpose 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

• Proven DDR4 Reliability: Mature, widely-supported DDR4 platform with broad server compatibility across HPE, Dell, Supermicro, and Lenovo 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
• RoHS Compliant: Meets global environmental and safety standards for enterprise deployments

Technical Specifications

• Part Number: M393A2G40DB0-CPB2Q
• Manufacturer: Samsung
• Memory Type: DDR4 SDRAM
• Module Type: RDIMM (Registered / Buffered)
• Capacity: 16GB
• Speed: 2133MHz (PC4-17000)
• CAS Latency: CL15
• Timing: 15-15-15
• 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

• Virtualization: VMware vSphere, Microsoft Hyper-V, and KVM deployments on DDR4 server platforms
• Database Servers: MySQL, PostgreSQL, Microsoft SQL Server, and Oracle database workloads requiring reliable ECC memory
• General-Purpose Computing: Enterprise application servers, file servers, and web servers requiring stable, high-capacity memory
• Legacy Infrastructure Expansion: Cost-effective memory expansion for existing DDR4 server deployments

Compatibility

• Compatible with DDR4 RDIMM slots only — not compatible with DDR5 platforms
• CPB2Q 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 CPB2Q qualification suffix indicate?

Samsung uses qualification suffixes to denote OEM validation, regional certification, or specific server vendor testing. CPB2Q 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 a lower speed if my server does not support 2133MHz?

DDR4 modules are backward speed-compatible — if your server platform does not support 2133MHz, the module will train down to the platform's maximum supported speed. Always verify with your server vendor's QVL to confirm supported configurations.

Whether you are expanding memory in an existing DDR4 server infrastructure, deploying new virtualization hosts, or scaling database server capacity, the Samsung M393A2G40DB0-CPB2Q delivers the proven DDR4 reliability, ECC protection, and Samsung manufacturing quality your enterprise server environment demands.