SK HYNIX HMCG94MEBRX020N Rdimm Server Memory 64GB 2RX4 PC5-4800B DDR5

( Brand: Sk Hynix ), ( Manufacturer Part Number: HMCG94MEBRX020N ), ( Total Capacity: 64 Gb ), ( R2 Grading Definitions: Aerworldwide.com/wp-content/uploads/2025/09/r2-conditions ), ( Memory Features: Registered ), ( Form Factor: Rdimm ), ( Type: Gddr5 Sdram ), ( R2v3 Cosmetic Grade: C3 ), ( Bus Speed: Pc5-38400 ), ( R2v3 Funtional Grade: F3 ), ( Country Of Origin: Korea, South )

Review SK HYNIX 2rx4 Rdimm Server Memory

The **SK Hynix HMCG94MEBRX020N** is a high-performance **64GB (2x32GB) RDIMM (Registered DIMM) DDR5 memory module** engineered for enterprise-grade servers, delivering uncompromising speed, reliability, and scalability to meet the demands of modern data centers and high-performance computing environments. Designed with **PC5-4800B (DDR5-4800) clock speed**, this module operates at an optimized frequency of **4,800 MHz**, enabling rapid data transfer rates of **38.4 GB/s per channel** when paired with compatible server platforms, ensuring seamless multitasking, accelerated workload processing, and reduced latency in memory-intensive applications such as virtualization, cloud computing, and AI/ML inference. Built using **SK Hynix s advanced 16Gb (2Mbit) DDR5 DRAM technology**, the module features **2Rx4 architecture**, meaning it utilizes **four ranks of memory per DIMM**, which enhances bandwidth efficiency and allows for deeper memory pools without sacrificing performance ideal for servers requiring large virtual memory allocations or high-core-count processors.

The **RDIMM configuration** incorporates a **registered buffer chip** to manage data signaling, reducing signal integrity issues and improving stability in high-density server configurations where multiple DIMMs are installed across multiple channels. This design minimizes electromagnetic interference (EMI) and ensures consistent performance even in complex multi-socket systems, making it a dependable choice for mission-critical infrastructure. Additionally, the module adheres to **JEDEC standards** for DDR5 RDIMM, ensuring broad compatibility with a wide range of **Intel Xeon, AMD EPYC, and other enterprise-grade server processors**, including those supporting **DDR5-4800 or higher speeds** when overclocked. The **ECC (Error-Correcting Code) capability** is standard, providing real-time detection and correction of single-bit errors, which is essential for maintaining data integrity in fault-tolerant environments where uptime and accuracy are non-negotiable.

Constructed with **high-reliability components**, the HMCG94MEBRX020N is built to endure the rigorous thermal and mechanical stresses of 24/7 server operations. The module features **low-power consumption** while maintaining peak performance, contributing to energy-efficient data centers with reduced operational costs. Its **dual-rank design** balances memory capacity and bandwidth, making it suitable for workloads that require a balance between speed and density, such as database management systems, high-frequency trading platforms, or large-scale containerized applications. The **200-pin DDR5 SODIMM interface** ensures robust connectivity, while the **288-pin RDIMM form factor** guarantees seamless integration into modern server motherboards equipped with DDR5 memory slots. Whether deployed in **single-socket or multi-socket configurations**, this memory module is a strategic investment for organizations seeking to future-proof their infrastructure with **high-speed, low-latency, and enterprise-grade performance**.

**Pros and Cons of the SK Hynix HMCG94MEBRX020N (64GB 2Rx4 PC5-4800B DDR5 RDIMM Server Memory)**

### **Pros**

1. **High Capacity and Density**

The 64GB capacity per module is ideal for high-end servers requiring substantial memory for workloads like virtualization, databases, or large-scale applications. The 2Rx4 configuration (two ranks, four channels) provides efficient data throughput, reducing latency in memory access.

2. **DDR5 Technology**

DDR5 offers several advantages over DDR4, including higher bandwidth (up to 4800 MT/s), improved power efficiency, and support for larger memory capacities per module. This translates to better performance for memory-intensive tasks and future-proofing for systems that support DDR5.

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

RDIMMs are designed for server environments where stability and reliability are critical. They include a buffer (register) that helps manage data signals, reducing the risk of errors on long memory buses. This makes them suitable for multi-socket servers where signal integrity is a concern.

4. **Compatibility with Modern Servers**

The module is designed for servers that support DDR5 RDIMMs, which includes many enterprise-grade systems from vendors like Dell, HP, Lenovo, and others. It is also compatible with newer Intel Xeon and AMD EPYC processors, which leverage DDR5 for improved performance.

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

While not explicitly stated in the model number, most RDIMMs in this range support ECC, which is essential for servers to detect and correct memory errors. This enhances data integrity, especially in critical applications like financial systems or healthcare databases.

6. **Scalability**

The 64GB capacity allows for larger server configurations, reducing the need for additional DIMMs and simplifying memory management. This is particularly useful in environments where memory is a bottleneck.

7. **Manufacturer Reputation**

SK Hynix is a well-known semiconductor manufacturer with a strong reputation for producing reliable memory modules. Their products are widely used in both consumer and enterprise markets, ensuring availability and support.

---

### **Cons**

1. **High Cost**

DDR5 RDIMMs, especially those with high capacities like 64GB, are significantly more expensive than DDR4 modules. The cost per gigabyte is higher, which can be a barrier for budget-conscious deployments or smaller-scale servers.

2. **Power Consumption**

DDR5 modules generally consume more power than DDR4 due to their higher clock speeds and increased voltage requirements. This can lead to higher operational costs, especially in large server farms, and may require additional cooling infrastructure.

3. **Limited Availability and Lead Times**

High-capacity DDR5 RDIMMs can sometimes face supply chain issues, leading to longer lead times or limited stock. This may require advance ordering or reliance on third-party suppliers, which could introduce risks.

4. **Compatibility Risks**

While this module is designed for DDR5 servers, not all systems support 64GB RDIMMs. Some servers may have memory channel limitations or require specific configurations (e.g., balanced memory across channels). Always verify compatibility with your server s BIOS or documentation to avoid issues.

5. **Heat Generation**

Higher clock speeds and power consumption can result in increased heat output. This may necessitate additional cooling solutions or adjustments to server airflow to maintain optimal operating temperatures.

6. **Potential for Overkill**

For less demanding workloads (e.g., small business servers, lightweight virtualization), 64GB modules may be overkill. In such cases, lower-capacity modules (e.g., 32GB or 16GB) could provide better cost efficiency without sacrificing performance.

7. **Firmware and BIOS Updates**

Some servers may require firmware or BIOS updates to fully support DDR5 RDIMMs. This can introduce downtime or compatibility issues if not addressed proactively.

---

### **Recommendation**

The **SK Hynix HMCG94MEBRX020N (64GB 2Rx4 PC5-4800B DDR5 RDIMM)** is a high-performance memory module well-suited for enterprise servers, data centers, and workloads requiring substantial memory bandwidth and capacity. Its DDR5 architecture, RDIMM design, and ECC support make it a robust choice for environments where reliability, scalability, and future-proofing are priorities.

- **High-end servers** running memory-intensive applications (e.g., virtualization, databases, AI/ML workloads).

- **Multi-socket systems** where balanced memory channels and signal integrity are critical.

- **Deployments where long-term scalability** is a priority, and the initial investment in DDR5 is justified.

For **smaller servers, budget-conscious deployments, or less demanding workloads**, lower-capacity DDR5 modules (e.g., 32GB) or even DDR4 RDIMMs may offer better cost efficiency without sacrificing performance.

If your server supports DDR5 RDIMMs and you require high memory capacity for performance-critical applications, this module is an excellent choice. Verify compatibility with your server s documentation and ensure your power and cooling infrastructure can handle the increased demands. For most other use cases, evaluate whether the benefits outweigh the costs before purchasing.

Details:

Not applicable for items purchased in error or damaged by customer misuse. Warranty starts the day item is shipped. 64GB DDR5-4800MHz Server RAM Module.

part #: hmcg94mebrx020n prices

• $264.99-$1190.00

specifications servermemor:

• brand: Sk Hynix
• mpn: Hmcg94mebrx020n
• total capacity: 64 Gb
• r2 grading definitions: Aerworldwide.com/wp-content/uploads/2025/09/r2-conditions
• memory features: Registered
• form factor: Rdimm
• type: Gddr5 Sdram
• r2v3 cosmetic grade: C3
• bus speed: Pc5-38400
• r2v3 funtional grade: F3
• country of origin: Korea, South

general servermemor:

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

seller servermemor:

• rating: 99.7%
• city: El Paso, Texas
• # reviews: 3803

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• time: 30 Days

shipping servermemor:

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• cost: $0.00

offer servermemor:

• quantity: 0
• sold: 1
• started: April 17, 2026
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