SAMSUNG Memory 32GB 2RX4

( Brand: Samsung ), ( Manufacturer Part Number: M393A4K40CB2-CTD6Q-SERVER ), ( Model: 32GB 2RX4 PC4-2666V-RB2-12-MA0 ), ( Total Capacity: 32 Gb ), ( Memory Features: Ecc Memory, Registered ), ( Form Factor: Rdimm ), ( Type: Ddr4 Sdram ), ( Unit Type: Unit ), ( Number Of Pins: 288 ), ( Bus Speed: Pc4-21300 )

Review SAMSUNG 2rx4 Pc4-2666v-rb2-12-ma0-m393a4k40cb2-ctd6q-server Memory

The **Samsung M393A4K40CB2-CTD6Q Server Memory** is a high-performance, enterprise-grade DDR4 RAM module designed to deliver exceptional speed, reliability, and efficiency for demanding server workloads. Part of Samsung s **M393 series**, this **32GB (2Rx4) DDR4 memory module** operates at an optimized frequency of **PC4-2666 (2666 MHz)**, ensuring seamless data transfer rates of **21.33 GT/s** for enhanced processing power. Engineered with **low-power, high-efficiency architecture**, this module adheres to the **CT (Commercial Temperature) range**, making it ideal for data centers and mission-critical applications where stability and longevity are paramount.

Built with **Samsung s advanced 8Gb DDR4 DRAM chips**, this module features a **registered (RDIMM) configuration**, which improves signal integrity and reduces latency in multi-socket server systems. The **2Rx4 organization** allows for efficient memory channel utilization, maximizing bandwidth while maintaining optimal performance across high-core-count processors. With a **1.2V operating voltage**, this module balances power efficiency with performance, reducing heat generation and extending the lifespan of server hardware.

The **M393A4K40CB2-CTD6Q** is fully compatible with **Intel Xeon and AMD EPYC processors**, making it a versatile choice for modern server architectures. It supports **ECC (Error-Correcting Code) memory**, which helps detect and correct data errors in real-time, ensuring data integrity in critical applications such as virtualization, cloud computing, and high-performance databases. Additionally, the module includes **Samsung s advanced memory controller technology**, which enhances reliability through features like **memory scrubbing and wear-leveling**, reducing the risk of data corruption over extended operational periods.

Designed with **industrial-grade components**, this memory module is built to withstand the rigors of continuous operation in demanding environments. The **CT (Commercial Temperature) rating** ensures stable performance across a broad operational range, typically between **0 C to 70 C**, making it suitable for both traditional data centers and edge computing deployments. The **MA0 (Memory Allocation) designation** indicates that this module is optimized for **240-pin DDR4 DIMM sockets**, ensuring seamless integration with a wide range of server motherboards.

For organizations prioritizing **scalability and future-proofing**, the **M393A4K40CB2-CTD6Q** provides a robust foundation for expanding memory capacity without compromising performance. Whether deployed in **high-density servers, storage arrays, or AI/ML workloads**, this module delivers the speed, endurance, and reliability required to handle the most intensive computational tasks. With Samsung s reputation for innovation and quality, this memory solution is a trusted choice for enterprises seeking peak performance in their server infrastructure.

The **Samsung M393A4K40CB2-CTD6Q** is a 32GB (2x16GB) DDR4 RDIMM server memory module rated for **PC4-2666 (DDR4-2133)** with **Registered (RDIMM)** configuration. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **High Capacity and Density**

The module provides **32GB of RAM in a single 240-pin RDIMM configuration**, which is ideal for servers requiring large memory pools. This reduces the number of slots needed compared to smaller DIMMs, simplifying cable management and board design.

2. **Registered (RDIMM) Design**

RDIMMs are optimized for **multi-socket and high-channel-count servers**, where they help stabilize memory performance by buffering signals. This reduces the risk of instability in systems with many DIMMs or high core counts.

3. **Low Power Consumption**

DDR4-2133 (PC4-2666) modules are more power-efficient than faster DDR4 variants (e.g., DDR4-3200 or DDR4-3600), making them suitable for **energy-conscious data centers** or workloads where thermal management is critical.

4. **Reliability and Stability**

Samsung is a reputable manufacturer with a strong track record for **server-grade memory**, offering better stability and longevity compared to consumer-grade RAM. The module includes **ECC (Error-Correcting Code) support**, which is essential for servers to detect and correct data corruption.

5. **Compatibility with Older and Mid-Range Servers**

DDR4-2133 is a widely supported speed, making this module compatible with **many enterprise servers, workstations, and mid-range data center systems**. It avoids the need for expensive motherboard upgrades if the system already supports DDR4.

6. **Cost-Effective for Large Deployments**

While not the fastest option, the **price per GB is often lower** than higher-speed server memory, making it a budget-friendly choice for **virtualization, database servers, or general-purpose workloads** where raw speed is not the primary concern.

7. **Support for Multi-Channel Configurations**

The module works well in **dual-channel or quad-channel setups**, allowing for better bandwidth utilization in servers with multiple memory channels.

8. **Long-Term Availability**

As a mid-range DDR4 module, it is less likely to become obsolete quickly compared to cutting-edge memory (e.g., DDR5), ensuring easier replacement and maintenance in the future.

---

### **Cons**

1. **Slower Speed Compared to Modern Options**

DDR4-2133 is **not the fastest available DDR4 speed**, and newer servers often support **DDR4-3200, DDR4-3600, or DDR5**. If running **CPU-intensive workloads (e.g., high-performance computing, real-time processing, or gaming servers)**, this module may become a bottleneck.

2. **Limited to DDR4 (No DDR5 Support)**

The module is **DDR4-only**, meaning it cannot be used in servers that require **DDR5 memory**. While DDR4 is still widely used, upgrading to DDR5 in the future may necessitate a full memory replacement.

3. **Higher Latency**

DDR4-2133 has **higher CAS latency (typically CL15 or CL17)** compared to faster modules (e.g., CL15 at DDR4-3200). This can impact **latency-sensitive applications** like databases, in-memory databases (e.g., Redis), or low-latency trading systems.

4. **Not Ideal for High-End Workloads**

For **extreme performance needs** (e.g., AI/ML training, high-frequency trading, or rendering), **DDR4-3200 or DDR5 modules** are preferred due to their higher bandwidth and lower latency.

5. **Potential for Overkill in Small Servers**

If the server has **fewer CPU cores or channels**, the full 32GB may not be fully utilized, leading to **wasted capacity**. In such cases, smaller DIMMs (e.g., 16GB or 8GB) might be more efficient.

6. **Compatibility Issues with Newer Platforms**

Some **recent Intel Xeon or AMD EPYC servers** may require **DDR4-3200 or DDR5**, making this module incompatible without a motherboard upgrade.

7. **No Support for Advanced Features (e.g., Optane, Persistent Memory)**

Unlike some newer server memory, this module does not support **Intel Optane DC Persistent Memory** or other advanced caching technologies, limiting its use in next-gen storage solutions.

---

### **Conclusion**

The **Samsung M393A4K40CB2-CTD6Q** is a **solid, reliable choice for general-purpose server workloads**, particularly in **virtualization, database hosting, or mid-range data center environments** where **stability, capacity, and cost-efficiency** are prioritized over raw speed. It excels in **multi-socket servers, enterprise applications, and legacy systems** where DDR4-2133 is still the standard.

However, if the server is **CPU-bound, requires high bandwidth, or is part of a high-performance computing cluster**, a **faster DDR4 (e.g., 3200MHz) or DDR5 module** would be a better investment. Additionally, for **future-proofing**, consider whether the system will support DDR5 upgrades in the next few years.

---

### **Recommendation**

- You need **32GB of reliable, ECC-protected RAM** for a **server running virtual machines, databases, or general workloads**.

- Your system **only supports DDR4-2133** (e.g., older Intel Xeon E5/E7, some AMD EPYC 7000/9000, or mid-range workstations).

- **Cost efficiency** is more important than raw speed, and you want **long-term availability**.

- You are using a **multi-socket server** where RDIMMs provide stability benefits.

- Your server supports **DDR4-3200 or DDR5**, and you need **better performance for CPU-intensive tasks**.

- You are running **latency-sensitive applications** (e.g., real-time analytics, trading systems).

- The server has **fewer memory channels**, and you prefer **smaller DIMMs** for better scalability.

- You plan to **upgrade to DDR5 in the future** and want to future-proof your investment.

For most **enterprise and business servers**, this module is a **good, cost-effective choice**. However, for **high-performance or cutting-edge workloads**, investing in faster memory (if compatible) will yield better results. Always verify **motherboard and CPU compatibility** before purchasing.

Details:

Photos from part of the. Samsung 32GB DIMM 2Rx4 PC4-2666V-RB2-12 Registered ECC Memory DDR4.: Please view picture for condition of the item, everything in pictures provided is included.

part #: 32gb prices

• $64.99-$279.00

specifications servermemor:

• brand: Samsung
• mpn: M393a4k40cb2-ctd6q-server
• model: 32gb 2rx4 Pc4-2666v-rb2-12-ma0
• total capacity: 32 Gb
• memory features: Ecc Memory, Registered
• form factor: Rdimm
• type: Ddr4 Sdram
• unit type: Unit
• number of pins: 288
• bus speed: Pc4-21300

payments servermemor:

• wallet: Google-pay
• other
• credit card: Diners-club

shipping servermemor:

• carrier: USPS
• type: Calculated
• service: USPS Ground Advantage
• cost: $0.00
• transit: 3-7 Days
• class: Standard

offer servermemor:

• best offers: True
• options: Ship-to-home
• availability: In Stock
• sold: 0
• started: May 4, 2026
• quantity: 4

general servermemor:

• Enterprise Networking, Servers > Server Components > Server Memory RAM
• condition: Used

seller servermemor:

• city: Everett, Massachusetts
• rating: 100.0%
• # reviews: 2904

returns servermemor:

• policy: No Returns

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