SAMSUNG M391A1K43BB2-CWE Ecc Dimm Serverram SAMSUNGDDR4 2X8GB PC4-2400T-UA2-11

( Brand: Samsung ), ( Manufacturer Part Number: M391A1K43BB2-CWE ), ( Form Factor: Dimm ), ( Type: Ddr4 Sdram ), ( Total Capacity: 16 Gb ), ( Capacity Per Module: 8 Gb ), ( Number Of Pins: 288 ), ( Bus Speed: Pc4-2400t-ua2-11 ), ( Memory Features: Ecc Memory )

Review SAMSUNG Samsungddr4 Ecc Dimm 16gb Serverram

The **Samsung M391A1K43BB2-CWE** is a high-performance, enterprise-grade **DDR4 ECC Registered DIMM** designed specifically for demanding server and workstation environments where reliability, speed, and stability are paramount. This **2x8GB (16GB total) kit** delivers a robust memory solution optimized for data-intensive applications, virtualization, and high-end computing workloads. Built with Samsung s proven **K4B4G3246A-CWE** memory chips, this module adheres to strict **JEDEC standards**, ensuring seamless compatibility with a wide range of **Intel Xeon, AMD EPYC, and other high-end server platforms** that support **DDR4-2400 (PC4-2400T)** speeds. The **ECC (Error-Correcting Code) functionality** provides critical protection against data corruption, making it an ideal choice for mission-critical systems where uptime and data integrity are non-negotiable.

Featuring **Registered (Buffered) architecture**, this DIMM module is engineered to handle the high-speed data demands of modern servers while minimizing signal integrity issues, reducing latency, and improving overall system stability. The **low-power, high-efficiency design** ensures optimal thermal performance, allowing for extended operation without overheating, even in densely populated server racks. The **UDIMM (Unbuffered DIMM) alternative** is not recommended for this module, as it is explicitly designed for **buffered memory channels**, which are standard in enterprise-grade servers. The **CL15-15-15-35** timing configuration further enhances performance by optimizing latency and throughput, making it well-suited for workloads such as database management, cloud computing, and AI/ML processing.

Samsung s rigorous **quality control and testing processes** ensure that each module undergoes **stress testing, burn-in procedures, and reliability validation** before shipment, guaranteeing long-term durability and consistent performance in the most demanding environments. The **CWE (Commercial Grade) designation** indicates that this memory is built to withstand extended operational lifespans, making it a cost-effective solution for businesses seeking **high availability and scalability**. Whether deployed in **virtualized data centers, high-performance computing clusters, or enterprise-level storage systems**, this **16GB DDR4 ECC Registered DIMM** delivers the speed, endurance, and reliability required to keep modern infrastructure running at peak efficiency.

**Pros and Cons of buying a Samsung M391A1K43BB2-CWE (Samsung DDR4 ECC DIMM 2x8GB PC4-2400T-UA2-11 Server RAM)**

### **Pros**

1. **ECC Memory for Data Integrity** This is ECC (Error-Correcting Code) RAM, which is designed to detect and correct single-bit errors. This is critical for servers, workstations, and applications where data accuracy is paramount, such as databases, virtualization, or financial systems. Without ECC, undetected memory errors can lead to crashes, corruption, or security vulnerabilities.

2. **Registered (Buffered) Design** The "UA2" designation indicates this is a registered (buffered) DIMM. Registered RAM is optimized for high-density server systems, reducing signal interference on the memory bus and improving stability in multi-socket or high-channel-count systems. This makes it suitable for enterprise servers, RAID controllers, and high-end workstations.

3. **Dual-Channel Configuration** The 2x8GB kit is designed for dual-channel operation, which can improve performance in compatible systems by doubling the effective bandwidth compared to single-channel setups. This is particularly useful for CPU-bound workloads like rendering, compiling, or running multiple virtual machines.

4. **Low Latency (CL19)** The CAS latency of 19 is relatively low for server-grade memory, which can help with performance in latency-sensitive applications. While server RAM often prioritizes reliability over speed, this module strikes a balance.

5. **Compatibility with Server Platforms** This is a server-grade module, meaning it is designed to work with enterprise motherboards, RAID cards, and high-end workstations that require ECC and registered memory. It is not consumer-grade, so it avoids the pitfalls of cheaper, non-ECC RAM in professional environments.

6. **Reliability and Longevity** Samsung is a reputable manufacturer with a strong track record in memory production. Server-grade RAM is built to withstand continuous operation, which is essential for 24/7 uptime in data centers or mission-critical environments.

7. **PC4-2400T Specification** The PC4-2400T rating translates to a speed of 1200 MHz (2400 MT/s), which is a standard speed for many server platforms. While not the fastest available, it is sufficient for most enterprise workloads without requiring overclocking or compatibility issues.

8. **Unbuffered Alternatives Not Recommended for Servers** Unlike some consumer RAM, this is explicitly designed for server use, avoiding the risks of using unbuffered or non-ECC memory in professional setups.

---

### **Cons**

1. **Higher Cost Compared to Consumer RAM** Server-grade ECC and registered RAM is significantly more expensive than consumer DDR4 RAM. For non-server applications (e.g., gaming, general desktop use), this module is overkill and unnecessarily costly.

2. **Limited Performance Gains for Non-Server Workloads** If you are not running a server, database, virtualization platform, or other data-intensive workload, the performance benefits of ECC and registered RAM are minimal. Consumer-grade RAM with lower latency or higher speeds may offer better value for gaming, content creation, or general productivity.

3. **Compatibility Issues with Non-Server Motherboards** This RAM is designed for server motherboards, RAID cards, or high-end workstations that support ECC and registered DIMMs. Attempting to use it in a consumer motherboard may result in compatibility issues, such as not being recognized, causing instability, or even damaging the motherboard s memory controller in extreme cases.

4. **Overkill for Small-Scale Use** If you are running a single-user workstation or a small home server, the cost and complexity of ECC and registered RAM may not justify the investment. For example, a home NAS or a personal gaming PC would benefit far more from cheaper, faster, or lower-latency consumer RAM.

5. **No Overclocking Support** Server-grade RAM is typically locked to its specified speed and timings. If you need to push memory performance beyond its rated specs (e.g., for extreme overclocking), this module will not accommodate that.

6. **Potential for Redundancy in Some Cases** Some modern server platforms use RDIMM (Registered DIMM) or LRDIMM (Load-Redundant DIMM) modules, which offer additional features like memory redundancy. While this module is a standard RDIMM, it may not include all the advanced features of newer server memory types, depending on the use case.

7. **Waste of Resources in Non-Critical Applications** For applications where data integrity is not a concern (e.g., general office work, light web browsing, or casual gaming), the extra cost and complexity of ECC RAM are unnecessary. The money could be better spent on other upgrades like storage, GPU, or CPU.

---

### **Conclusion**

This **Samsung M391A1K43BB2-CWE (2x8GB DDR4 ECC Registered DIMM PC4-2400T)** is an excellent choice if you are building or upgrading a **server, workstation for data-intensive tasks, or a high-end professional system where reliability and data integrity are critical**. The ECC and registered design ensure stability, error correction, and compatibility with enterprise hardware, making it ideal for databases, virtualization, RAID arrays, or financial/medical applications.

However, if you are purchasing this for **consumer use (gaming, general desktop, or non-server workstations)**, the cost and specifications are unnecessary. In such cases, a **cheaper, faster, or lower-latency consumer DDR4 kit** would provide better value without sacrificing performance for most applications.

### **Recommendation**

- You are building a **server, workstation for virtualization, database hosting, or RAID storage**.

- You need **ECC memory for data integrity** in professional or mission-critical environments.

- Your motherboard or platform **requires registered (buffered) DIMMs**.

- You are running **CPU-intensive workloads** where stability and reliability are prioritized over raw speed.

- You are using it in a **consumer desktop or gaming PC**.

- You are on a **tight budget** and can achieve similar performance with cheaper, non-ECC RAM.

- Your system **does not support ECC or registered memory**, as compatibility issues may arise.

- You need **higher memory speeds or lower latency** for specific applications (e.g., gaming or content creation).

For most **non-server users**, investing in this module is a waste of money. For **enterprise or professional users**, it is a solid, reliable choice that justifies its cost. Always verify compatibility with your motherboard or platform before purchasing.

Details:

Selling two sticks of 8GB DDR4 desktop memory module made by Samsung. Condition: Used good, clean, and tested. Fully tested and working perfectly. Model M378A1K43CB2-CRC.

Pulled from a functioning system and kept in good condition with no damage to the pins or board.

part #: m391a1k43bb2 prices

• $40.00-$75.00

specifications servermemor:

• brand: Samsung
• mpn: M391a1k43bb2-cwe
• form factor: Dimm
• type: Ddr4 Sdram
• total capacity: 16 Gb
• capacity per module: 8 Gb
• number of pins: 288
• bus speed: Pc4-2400t-ua2-11
• memory features: Ecc Memory

shipping servermemor:

• cost: $5.52
• transit: 5-10 Days
• carrier: USPS
• service: USPS Ground Advantage
• class: Standard
• type: Calculated

returns servermemor:

• policy: No Returns

offer servermemor:

• quantity: 1
• sold: 0
• availability: In Stock
• started: February 18, 2026
• best offers: True
• options: Ship-to-home

payments servermemor:

• wallet: Apple-pay
• other
• credit card: Mastercard

seller servermemor:

• # reviews: 0
• city: San Marcos, California
• rating: 0.0%

general servermemor:

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

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