SK HYNIX HMCG78MEBA105N Rdimm Ecc Server Memory DDR5 1X16GB PC5-4800B

( Brand: Sk Hynix ), ( Manufacturer Part Number: HMCG78MEBA105N ), ( Model: HMCG78MEBA105N AA ), ( Form Factor: Rdimm ), ( Type: Ddr5 Rdimm ), ( Total Capacity: 16 Gb ), ( Number Of Pins: 288 ), ( Bus Speed: Pc5-4800b ), ( Memory Features: Ecc Memory, Registered )

Review SK HYNIX Rdimm Ecc Registered 16gb 1x16gb Server Memory

The **SK Hynix HMCG78MEBA105N** is a high-performance **DDR5 RDIMM (Registered Dual Inline Memory Module)** designed specifically for enterprise and server-grade applications, delivering uncompromising reliability, efficiency, and scalability for modern data centers. Engineered with **16GB of high-density memory per module**, this module offers a robust **1x16GB configuration**, allowing for seamless integration into high-end server architectures that demand substantial memory capacity without sacrificing performance. Built on **ECC (Error-Correcting Code) technology**, the HMCG78MEBA105N ensures data integrity by automatically detecting and correcting single-bit errors, which is critical for mission-critical workloads such as virtualization, database management, and high-frequency trading systems where uptime and accuracy are non-negotiable.

This DDR5 RDIMM operates at an impressive **PC5-4800B (DDR5-4800) speed**, providing a **4800 MT/s (Megatransfers per second) data transfer rate**, which translates to significantly faster data processing compared to previous generations. The **B (Binned) designation** indicates that this module has been optimized for performance within a specific voltage and timing range, ensuring compatibility with the latest Intel Xeon and AMD EPYC processors while maximizing bandwidth and latency reduction. The **RDIMM architecture** incorporates a registered buffer, which helps stabilize memory signals over longer traces, reducing the risk of data corruption in high-channel-count server configurations. This makes it an ideal choice for servers equipped with multiple memory slots, where signal integrity and stability are paramount.

SK Hynix, a global leader in semiconductor memory solutions, has infused this module with **advanced manufacturing processes** to deliver exceptional endurance, power efficiency, and thermal management. The **low-power design** of the DDR5-4800B specification further enhances energy efficiency, reducing operational costs in large-scale server deployments. Additionally, the module is built to meet stringent **JEDEC standards**, ensuring broad compatibility with a wide range of server platforms while maintaining long-term reliability. Whether deployed in cloud computing environments, AI/ML workloads, or high-performance computing clusters, the **HMCG78MEBA105N** stands as a dependable foundation for demanding applications that require both speed and precision.

For administrators and IT professionals seeking to future-proof their infrastructure, this SK Hynix DDR5 RDIMM module offers an excellent balance of **capacity, performance, and reliability**, making it a strategic investment for organizations prioritizing scalability and high-performance memory solutions. Its **ECC protection, high-speed operation, and enterprise-grade build quality** ensure that it can handle the most intensive computational tasks with ease, reinforcing its position as a top-tier choice for next-generation server memory requirements.

**Pros and Cons of Buying SK Hynix HMCG78MEBA105N DDR5 RDIMM ECC 1x16GB PC5-4800B Server Memory**

### **Pros**

1. **High Performance and Speed**

The module operates at **PC5-4800B (4800 MT/s)**, which translates to a clock speed of **2400 MHz**. This is a competitive speed for DDR5 server memory, offering faster data transfer rates compared to older DDR4 modules, which can improve system responsiveness, application performance, and throughput in data-intensive workloads like databases, virtualization, and AI/ML tasks.

2. **Registered DIMM (RDIMM) Design**

RDIMMs are optimized for server environments where multiple memory channels are used. They include a **register buffer** that reduces the load on the memory controller, improving stability and performance in multi-socket systems. This makes them a better choice for enterprise servers compared to LRDIMMs or UDIMMs.

3. **Error-Correcting Code (ECC) Support**

ECC memory helps detect and correct single-bit errors, which is critical for server applications where data integrity is paramount. This reduces the risk of crashes or corruption in critical workloads, such as financial systems, databases, or cloud infrastructure.

4. **Compatibility with Modern Servers**

This is a **DDR5** module, meaning it is designed for newer server platforms that support DDR5, such as Intel Xeon (e.g., 4th Gen and later) and AMD EPYC (e.g., Milan, Genoa, and later) processors. Upgrading to DDR5 can future-proof your server for upcoming software and workloads.

5. **Single Rank (1Rx8) Configuration**

The **1Rx8** configuration (1 rank with 8 chips per rank) provides a balance between capacity and performance. It is less prone to latency issues compared to multi-rank modules while still offering sufficient bandwidth for most server workloads.

6. **Reliability and Stability**

SK Hynix is a reputable manufacturer with a strong track record in producing high-quality memory modules. This module is likely to be stable and reliable in production environments, reducing the risk of failures or compatibility issues.

7. **Support for High-End Workloads**

- Virtualization (e.g., VMware, Hyper-V)

- Databases (e.g., Oracle, Microsoft SQL Server)

- Big data and analytics (e.g., Hadoop, Spark)

- AI/ML training and inference

- High-performance computing (HPC)

8. **Scalability**

DDR5 RDIMMs allow for easier scalability in multi-socket servers. You can add more DIMMs to increase capacity without significant performance degradation, as long as the memory controller can handle the additional channels.

---

### **Cons**

1. **Higher Cost Compared to DDR4**

DDR5 memory is generally more expensive than DDR4, even at similar capacities. This module costs significantly more than a comparable DDR4 ECC RDIMM (e.g., 16GB DDR4-3200 ECC RDIMM). The price difference may not be justified if your server is not yet DDR5-compatible or if you are running workloads that do not require the higher speed.

2. **Power Consumption**

DDR5 modules consume more power than DDR4 modules due to their higher operating voltage (1.1V vs. 1.2V for DDR4, but with higher current draw at higher speeds). This can lead to increased cooling requirements and higher energy costs, especially in large-scale server deployments.

3. **Limited Compatibility with Older Servers**

If your server uses **DDR4** or lacks DDR5 support, this module will not be usable. Upgrading to DDR5 may require purchasing a new server, which can be costly. Always verify compatibility with your motherboard and CPU before purchasing.

4. **Potential Latency in Multi-Rank Configurations (Not Applicable Here, but Worth Noting)**

While this is a **1Rx8** module, some DDR5 RDIMMs use multiple ranks (e.g., 2Rx8), which can introduce latency due to bank conflicts. However, since this is a single-rank module, this is not a concern here.

5. **Fewer Available Capacity Options**

DDR5 memory modules are still less common than DDR4, and higher-capacity options (e.g., 32GB, 64GB) may be more expensive or harder to find. If you anticipate needing larger capacities in the future, this could be a limitation.

6. **Potential for Overkill in Low-Demand Workloads**

If your server runs lightweight applications (e.g., web servers, basic file storage), the **4800 MT/s** speed may not provide noticeable performance benefits. In such cases, a slower but more cost-effective DDR4 module might suffice.

7. **Firmware and BIOS Considerations**

Some servers require specific BIOS updates or firmware configurations to fully utilize DDR5 memory. If your server s firmware is outdated, you may need to update it, which could involve downtime or additional support.

8. **Limited Refurbished or Open Market Availability**

DDR5 memory is relatively new, and the used/refurbished market is less developed compared to DDR4. This can make it harder to find discounted or replacement modules if needed.

---

### **Conclusion**

The **SK Hynix HMCG78MEBA105N 16GB DDR5-4800B ECC RDIMM** is a high-performance memory module well-suited for modern server workloads that demand speed, reliability, and scalability. Its **DDR5 speed, ECC protection, and RDIMM design** make it ideal for enterprise environments running virtualization, databases, AI, or HPC applications. However, the **higher cost, power consumption, and compatibility requirements** mean it may not be the best choice for budget-conscious users or those running less demanding workloads.

### **Recommendation**

- Your server supports DDR5 and you are upgrading from DDR4.

- You are running performance-critical workloads (e.g., virtualization, databases, AI/ML).

- You need reliable, high-speed memory for a multi-socket server.

- You are willing to invest in future-proofing your infrastructure.

- Your server is DDR4-only, and upgrading is not feasible.

- Your workloads do not require the speed or capacity of DDR5.

- You are operating on a tight budget, as DDR4 ECC RDIMMs offer similar reliability at a lower cost.

- You do not have the power infrastructure to handle the increased energy consumption.

For most **enterprise or high-performance server deployments**, this module is a strong choice. However, always verify compatibility with your hardware and workload requirements before purchasing. If you are unsure, consult with your server vendor or IT specialist to ensure the best fit for your needs.

Details:

The modules feature ECC memory for error correction and are registered improved stability. The SK Hynix DDR5 RDIMM ECC Registered 16GB server memory consists of one module. With a bus speed of PC5-4800B, this memory is designed for high performance in server applications.

part #: hmcg78meba105n prices

• $259.00-$909.99

specifications servermemor:

• brand: Sk Hynix
• mpn: Hmcg78meba105n
• model: Hmcg78meba105n Aa
• form factor: Rdimm
• type: Ddr5 Rdimm
• total capacity: 16 Gb
• number of pins: 288
• bus speed: Pc5-4800b
• memory features: Ecc Memory, Registered

offer servermemor:

• started: March 2, 2026
• best offers: True
• options: Ship-to-home
• sold: 0
• availability: In Stock
• quantity: 8

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seller servermemor:

• # reviews: 103
• city: Mountain View, California
• rating: 100.0%

general servermemor:

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

returns servermemor:

• policy: No Returns

shipping servermemor:

• transit: 5-11 Days
• cost: $8.46
• service: USPS Ground Advantage
• class: Standard
• type: Calculated
• carrier: USPS

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