SK HYNIX HMCG94ADBRA177N Rdimm Ecc Dell 5600B 64GB 256GB DDR5 2RX4 PC5

( Brand: Sk Hynix ), ( Manufacturer Part Number: HMCG94ADBRA177N ), ( Model: PC5 5600B HMCG94ADBRA177N ), ( Form Factor: Rdimm ), ( Type: Ddr5 ), ( Total Capacity: 256 Gb ), ( Capacity Per Module: 64 Gb ), ( Number Of Pins: 288 ), ( Memory Features: Registered, Ecc Memory )

Review SK HYNIX 256gb Rdimm Ecc 2rx4 Pc5 Dell

The **SK Hynix HMCG94ADBRA177N 256GB (64GB x4) DDR5 RDIMM ECC 2Rx4 PC5-5600B** memory module is a high-performance, enterprise-grade solution engineered to deliver exceptional reliability, scalability, and efficiency for demanding server workloads. Part of SK Hynix s advanced HMCG series, this module is meticulously crafted to meet the stringent requirements of modern data centers, offering a robust foundation for high-density computing environments. With a total capacity of **256GB**, this **DDR5 RDIMM (Registered DIMM)** module is designed to operate seamlessly in dual-rank (2Rx4) configurations, providing balanced performance and memory channel utilization. The **64GB per-rank architecture** ensures optimal data throughput while maintaining compatibility with a wide range of Dell server platforms, including high-end PowerEdge and PowerScale systems.

This module adheres to the **JEDEC PC5-5600B standard**, delivering a **5600MT/s (Megatransfers per second) data transfer rate**, which translates to sustained bandwidth of **44.8GB/s per channel**, significantly enhancing system responsiveness for memory-intensive applications such as virtualization, database management, and AI/ML workloads. The **ECC (Error-Correcting Code) functionality** is a critical feature, ensuring data integrity by detecting and correcting single-bit errors in real-time, which is indispensable for mission-critical operations where uptime and accuracy are non-negotiable. Additionally, the **DDR5 architecture** introduces improvements in power efficiency, memory density, and bandwidth compared to previous generations, making it an ideal choice for next-generation server deployments.

Built with **SK Hynix s advanced 16Gb (256Mb) DDR5 DRAM chips**, this module leverages cutting-edge process technology to achieve higher performance while maintaining low power consumption. The **RDIMM configuration** is particularly advantageous for servers requiring large memory capacities, as it reduces the load on the memory controller and minimizes latency through registered signal buffering. The **2Rx4 design** further optimizes memory channel efficiency, allowing for smoother data handling in multi-socket systems. Compatibility with **Dell s PowerEdge and PowerScale servers** ensures seamless integration with enterprise-grade infrastructure, supporting configurations that demand both scalability and reliability.

For organizations prioritizing **future-proofing**, this module s support for **DDR5 s enhanced features**, such as improved power management and extended addressability, positions it as a long-term investment. Whether deployed in **hyperscale data centers, cloud computing environments, or high-performance computing clusters**, the **SK Hynix HMCG94ADBRA177N** delivers a compelling blend of speed, capacity, and reliability, making it a standout choice for next-generation server deployments. Its precision engineering and adherence to industry standards ensure that it meets the exacting demands of modern IT infrastructure, providing a solid foundation for high-performance computing in an increasingly data-driven world.

### **Pros and Cons of the SK Hynix HMCG94ADBRA177N (256GB, 64GB DDR5 RDIMM ECC 2Rx4 PC5-5600B, Dell Part Number)**

#### **Pros**

1. **High Capacity and Density**

The module offers **256GB of total capacity** (4x 64GB DIMMs), making it ideal for large-scale servers, workstations, or high-memory workloads like virtualization, databases, or AI/ML applications. This eliminates the need for multiple DIMMs, reducing complexity in server builds.

2. **DDR5 Technology with Improved Performance**

DDR5 provides **higher bandwidth (PC5-5600B 5600 MT/s)** compared to DDR4, enabling faster data transfer rates and improved efficiency in memory-bound applications. Features like **on-die ECC (error correction)** enhance reliability without requiring additional DRAM chips.

3. **Registered DIMMs (RDIMM) for Server Stability**

RDIMMs are designed for **enterprise and server environments**, where stability and error correction are critical. The **ECC (Error-Correcting Code)** functionality helps prevent data corruption, which is essential for mission-critical workloads.

4. **Dell Compatibility and Support**

This module is **Dell-certified**, ensuring compatibility with Dell PowerEdge servers (e.g., R750, R760, R760xd, R7625, etc.). Dell s validation reduces the risk of compatibility issues, and the module may come with **Dell s warranty and support**, including firmware updates.

5. **2Rx4 Configuration for Balanced Performance**

The **2Rx4 (2-rank, 4-channel)** configuration provides a good balance between **latency and throughput**. While not as low-latency as 1Rx4, it offers **better bandwidth utilization** in multi-socket systems, making it suitable for symmetric multiprocessing (SMP) servers.

6. **Power Efficiency Improvements**

DDR5 modules generally consume **less power per GB** compared to DDR4, which can reduce cooling and power costs in large-scale deployments. The **lower voltage requirements** (typically 1.1V vs. DDR4 s 1.2V) also contribute to efficiency.

7. **Future-Proofing with DDR5**

DDR5 is the **current standard for high-end servers**, and this module ensures compatibility with newer Intel Xeon (Sapphire Rapids, Emerald Rapids) and AMD EPYC (Milan, Genoa, Bergamo) processors. Upgrading to DDR5 now avoids potential bottlenecks in future-proofing.

8. **Reduced Physical Footprint**

With **256GB in a single 240-pin DIMM slot**, this module reduces the number of DIMMs needed compared to smaller capacities, saving space in tight server racks.

---

#### **Cons**

1. **High Cost Relative to Capacity**

The **price per GB is significantly higher** than consumer-grade DDR5 or even some enterprise DDR4 modules. For example, a 64GB DDR5 RDIMM ECC module may cost **$100 $150**, making the **256GB configuration expensive** for non-enterprise use. If you don t need the full capacity, buying smaller modules (e.g., 128GB or 64GB) may be more cost-effective.

2. **Limited Consumer/Workstation Use Case**

While DDR5 RDIMMs are excellent for **servers and high-end workstations**, they are **not compatible with consumer motherboards** (e.g., Intel Z790, AMD X670E). If you re building a **gaming PC or a non-server workstation**, this module is **overkill and incompatible**, requiring a different type (e.g., UDIMM or SO-DIMM).

3. **Potential Overkill for Smaller Workloads**

If your application (e.g., general office use, light virtualization, or small-scale databases) doesn t require **256GB of RAM**, this module may be **underutilized**, leading to wasted investment. Smaller capacities (e.g., 128GB or 64GB) might suffice for many use cases.

4. **Dell-Specific Part Number May Limit Flexibility**

While Dell-certified modules are reliable, they are **not always interchangeable with other brands** in non-Dell systems. If you plan to **mix vendors** or use this in a non-Dell server, verify compatibility with your specific motherboard and CPU.

5. **Higher Latency Than Low-Profile Configurations**

The **2Rx4 configuration** introduces slightly higher latency compared to **1Rx4 modules**, which are optimized for single-socket systems. In **CPU-bound workloads**, this may not be a major issue, but in **memory-intensive tasks**, a 1Rx4 module might offer better performance.

6. **Potential for Obsolescence**

While DDR5 is the current standard, **future server generations may push toward higher speeds (e.g., DDR5-6000 )** or new technologies (e.g., HBM, persistent memory). However, this module should remain relevant for **several years** in enterprise environments.

7. **Power and Cooling Considerations**

High-capacity RDIMMs generate **more heat** than smaller modules, which may require **better cooling solutions** in densely populated server racks. Ensure your server s power supply and cooling infrastructure can handle the load.

---

### **Conclusion**

The **SK Hynix HMCG94ADBRA177N (256GB DDR5 RDIMM ECC 2Rx4 PC5-5600B)** is an **excellent choice for enterprise servers, high-memory workloads, and Dell PowerEdge systems** where **reliability, scalability, and performance** are critical. Its **high capacity, ECC protection, and DDR5 speed** make it ideal for **virtualization, databases, AI/ML, and other memory-intensive applications**.

However, for **consumer PCs, gaming rigs, or smaller workstations**, this module is **overkill and incompatible**, making it a **poor value proposition**. Additionally, the **high cost per GB** may deter buyers who don t need the full 256GB capacity.

If you are **certain about your use case** (e.g., running a **Dell PowerEdge server with heavy workloads**), this module is a **strong recommendation**. Otherwise, consider **smaller capacities (e.g., 128GB or 64GB)** or **non-RDIMM configurations** (e.g., UDIMMs for workstations) to balance cost and performance.

### **Final Recommendation**

- You are **building or upgrading a Dell PowerEdge server** (e.g., R750, R760, R760xd).

- Your workload **requires 256GB of RAM** (e.g., virtualization, large databases, AI/ML, or high-end workstations).

- You **prioritize reliability, ECC protection, and DDR5 performance**.

- You are **building a consumer PC, gaming rig, or non-server workstation** (use UDIMMs instead).

- You **don t need 256GB** and can achieve similar performance with **smaller, more cost-effective modules**.

- You are **not using a Dell server** and want flexibility across multiple vendors.

For most **enterprise and high-end server users**, this is a **solid investment**. For others, **evaluate alternatives** based on your specific needs.

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part #: hmcg94adbra177n prices

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specifications servermemor:

• brand: Sk Hynix
• mpn: Hmcg94adbra177n
• model: Pc5 5600b Hmcg94adbra177n
• form factor: Rdimm
• type: Ddr5
• total capacity: 256 Gb
• capacity per module: 64 Gb
• number of pins: 288
• memory features: Registered, Ecc Memory

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• # reviews: 1992
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• city: Liberty Hill, Texas

general servermemor:

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

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offer servermemor:

• availability: In Stock
• options: Ship-to-home
• started: March 25, 2026
• quantity: 1
• sold: 0
• best offers: True

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