SK HYNIX HMCG78MEBRA112N Memory Rdimm 47 1RX8 PC5-4800E-RD0-09 DDR5

( Brand: Sk Hynix ), ( Manufacturer Part Number: HMCG78MEBRA112N ), ( Type: Ddr5 ), ( Bus Speed: Pc5-4800 ), ( Form Factor: Rdimm ), ( Capacity Per Module: 16 Gb ), ( Number Of Pins: 288 )

Review SK HYNIX Lot 47 16gb Memory Rdimm

The **SK Hynix HMCG78MEBRA112N-47-1RX8 PC5-4800E-RD0-09** is a high-performance **DDR5 Registered DIMM (RDIMM)** module designed for enterprise and high-end server applications where reliability, speed, and scalability are paramount. Engineered with SK Hynix s advanced **16Gb (256Mb x 16) DDR5 DRAM chips**, this module delivers exceptional memory density and efficiency, making it ideal for data centers, cloud computing, and mission-critical workloads that demand low latency and high throughput. Operating at a **4800 MT/s (megatransfers per second) data rate**, it adheres to the **JEDEC PC5-4800E standard**, ensuring compatibility with modern Intel Xeon and AMD EPYC processors while supporting **ECC (Error-Correcting Code) functionality** for data integrity and fault tolerance. The module features a **single-rank (1Rx8) configuration**, which simplifies installation and reduces power consumption compared to multi-rank alternatives, though it maintains robust performance for single-channel or dual-channel configurations depending on the server platform.

One of the standout features of this RDIMM is its **registered design**, which includes a buffer chip to stabilize data signaling across longer memory channels, reducing the risk of signal degradation in high-density server configurations. This architecture is particularly advantageous in systems with extensive memory slots, where unregistered DIMMs might struggle with stability. The module is **RDIMM-compatible**, meaning it requires a server motherboard with a registered memory controller (RMC) to function, which is standard in enterprise-grade systems. Additionally, it supports **DDR5 s advanced power management features**, including **DIMM-level power gating** and **fine-grained timing adjustments**, which help optimize energy efficiency and thermal performance in demanding environments.

Built with **industrial-grade reliability**, this SK Hynix RDIMM is manufactured using **12nm-class process technology**, ensuring long-term stability and resistance to wear over extended operational lifespans. The module is **fully compliant with DDR5 specifications**, including support for **DDR5 s enhanced power delivery mechanisms**, such as **DIMM-level power sequencing** and **reduced voltage operation (Vdd 1.1V)**, which contributes to lower power consumption while maintaining peak performance. Its **112-pin SODIMM-style connector** (though physically larger for server use) ensures seamless integration with compatible server platforms, including those from Dell, HP, Lenovo, and other major vendors.

For organizations deploying **high-performance computing (HPC), virtualization, or large-scale database systems**, this SK Hynix RDIMM provides a robust foundation for handling intensive workloads with minimal latency. Its **low-power, high-efficiency design** aligns with modern data center trends toward sustainability, while its **ECC protection** ensures data accuracy even in fault-prone environments. Whether deployed in a **2U server, blade system, or rack-mounted server**, this module delivers a balance of speed, reliability, and scalability, making it a premium choice for next-generation enterprise infrastructure.

### **Pros and Cons of SK Hynix HMCG78MEBRA112N-47-1RX8 (DDR5 RDIMM PC5-4800E-RD0-09)**

1. **High Performance** This is a DDR5 RDIMM module with a rated speed of **PC5-4800E (4800 MT/s)**, which is well-suited for modern Intel Xeon and AMD EPYC servers. The "E" designation indicates enhanced performance, often with better latency and efficiency compared to standard DDR5 modules.

2. **Registered DIMM (RDIMM) Design** RDIMMs are optimized for server workloads, reducing signal integrity issues and improving stability in multi-socket systems. They are better suited for high-channel-count servers than LRDIMMs or UDIMMs.

3. **Error-Correcting Code (ECC) Support** The module includes ECC, which helps detect and correct single-bit errors, making it ideal for mission-critical applications where data integrity is paramount.

4. **Compatibility with Intel Xeon & AMD EPYC** This module is designed for enterprise-grade servers, particularly those using Intel s 4th/5th Gen Xeon Scalable (Sapphire Rapids/Emerald Rapids) or AMD s EPYC 9004/9744 series. It supports **DDR5-4800** memory speeds, which are common in these platforms.

5. **Reliability & Durability** SK Hynix is a reputable manufacturer with a strong track record in memory production. The module is built for long-term use in data centers, with robust thermal management and signal integrity features.

6. **Scalability** RDIMMs allow for larger memory configurations (up to 128GB per DIMM in some systems), which is beneficial for high-memory workloads like virtualization, databases, and AI/ML applications.

7. **Low Power Consumption (Relative to Speed)** While DDR5 consumes more power than DDR4, this module is optimized for efficiency, reducing unnecessary energy waste compared to overclocked consumer memory.

---

1. **High Cost** Enterprise-grade RDIMMs are significantly more expensive than consumer DDR5 modules. This module is priced for servers, not budget-friendly desktop or workstation builds.

2. **Limited Consumer Use Case** Unless you are building a **high-end server, workstation, or HPC system**, this module is overkill. Most desktop users should opt for cheaper, non-RDIMM DDR5 kits.

3. **Requires Compatible Motherboard & CPU** Not all motherboards support DDR5 RDIMMs, and even if they do, they must be from a server-grade platform (e.g., Intel C621/C642 chipsets or AMD SP3/SP3a). Desktop motherboards typically do not support RDIMMs.

4. **No Overclocking Potential** RDIMMs are locked to their rated speed (4800 MT/s in this case) and cannot be overclocked like consumer memory. If you need higher speeds, you d need a different module or a platform that supports it.

5. **Higher Latency Than Some Alternatives** While RDIMMs are stable, they may have slightly higher latency compared to LRDIMMs or optimized consumer memory in certain workloads. However, this is negligible in most server applications.

6. **Potential for Overprovisioning** If you don t need 128GB per DIMM (or the full capacity of your server), you may end up with unused memory slots, increasing costs without proportional benefits.

7. **Warranty & Return Policies** Since this is an enterprise product, warranty terms and return policies may be stricter than those for consumer memory, making replacements or returns more complicated.

---

### **Conclusion & Recommendation**

- **Enterprise servers** (Intel Xeon Scalable 4th/5th Gen, AMD EPYC 9004/9744)

- **High-memory workloads** (virtualization, databases, AI/ML, HPC)

- **Mission-critical applications** where reliability and ECC are non-negotiable

- **Consumer desktops or gaming PCs** (use a cheaper DDR5 UDIMM kit instead)

- **Budget workstations** (unless you specifically need RDIMM support)

- **Systems with limited DDR5 RDIMM compatibility** (check motherboard specs)

- **Buy it if:** You are building a **server-grade system** that requires RDIMMs, ECC, and high memory capacity. The **4800 MT/s speed** is well-matched for modern Xeon/EPYC platforms, and SK Hynix s reliability ensures long-term performance.

- **Avoid it if:** You are a **gamer, content creator, or general desktop user** opt for a **cheaper DDR5 UDIMM kit** (e.g., Corsair, G.Skill, or Kingston) instead.

- **Consider alternatives if:** You need **higher speeds (e.g., DDR5-5600 )** or **lower latency** some LRDIMMs or optimized server memory may offer better performance in specific workloads.

For most users, this module is **justified only in professional server environments**. For everything else, prioritize cost efficiency and platform compatibility.

Details:

Model: HMCG78MEBRA112N. Condition: Used. This memory module has some minor markings from normal use, along with residual adhesive its previous application, and shows no major or obvious defects that would affect functionality. Comes in non-original packaging.

Notes: This memory module has been tested and verified, was carefully inspected with a magnifier for flaws or missing components. This item is guaranteed to be as described. Lot 47 SK Hynix HMCG78MEBRA112N 16GB 1Rx8 PC5-4800E-RD0-09 Memory DDR5 RDIMM. Error Correction: ECC Registered.

Manufacturer:SK Hynix.: PC5-4800E-RD0-09 Server Memory Module. 47 SK Hynix HMCG78MEBRA112N 16GB PC5-4800E-RD0-09 ECC Server Memory 1Rx8 DDR5. Specifications.

part #: hmcg78mebra112n prices

• $149.97-$315.00

specifications servermemor:

• brand: Sk Hynix
• mpn: Hmcg78mebra112n
• type: Ddr5
• bus speed: Pc5-4800
• form factor: Rdimm
• capacity per module: 16 Gb
• number of pins: 288

returns servermemor:

• paid by: Buyer
• policy: Returns Accepted
• time: 30 Days
• method: Money back

offer servermemor:

• availability: In Stock
• best offers: True
• options: Ship-to-home
• started: March 19, 2026
• quantity: 1
• sold: 0

seller servermemor:

• city: Leander, Texas
• rating: 99.9%
• # reviews: 90809

payments servermemor:

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

general servermemor:

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

shipping servermemor:

• class: Standard
• type: Fixed
• transit: 4-8 Days
• cost: $0.00
• service: Standard

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