SK HYNIX HMCG788EBRA115N Samsung Ecc Rdimm Server PC5-4800B 1RX8 DDR5 MEMORYHMCG79AEB115N

( Brand: Sk Hynix ), ( Manufacturer Part Number: HMCG788EBRA115N ), ( Form Factor: Rdimm ), ( Type: Ddr5 Ec8 ), ( Total Capacity: 16 Gb ), ( Number Of Pins: 288 ), ( Bus Speed: Pc5-38400 ), ( Country Of Origin: Vietnam ), ( Memory Features: Ecc Memory, Registered )

Review SK HYNIX Samsung 16gb Ecc Rdimm Reg Server

The **SK Hynix HMCG788EBRA115N** and **HMCG79AEBRA115N** are high-performance **DDR5 RDIMM (Registered DIMM) memory modules** designed exclusively for enterprise-grade servers, offering unparalleled reliability, efficiency, and scalability for demanding workloads. Engineered under Samsung s **PC5-4800B** specification, these modules operate at an advanced **4800 MT/s (Megatransfers per second)** data rate, delivering exceptional bandwidth and low-latency performance to accelerate data-intensive applications such as AI/ML training, high-frequency trading, large-scale databases, and virtualization environments. Both variants adhere to a **1Rx8 configuration**, meaning they feature a single-rank architecture with eight memory chips per DIMM, optimizing for balanced performance and power efficiency while maintaining compatibility with modern Intel Xeon and AMD EPYC server platforms.

The **HMCG788EBRA115N** and **HMCG79AEBRA115N** are **ECC (Error-Correcting Code) and Registered** modules, ensuring data integrity and stability in mission-critical environments where even the slightest error could lead to catastrophic failures. The **registered buffer** reduces bus contention, allowing for higher memory channel densities without compromising system stability, while the **ECC functionality** actively detects and corrects single-bit errors, minimizing downtime and data corruption risks. Both modules are **fully compliant with the DDR5 standard**, incorporating advanced features such as **On-DIE ECC (ODECC)**, which enhances error correction efficiency by integrating correction logic directly into the memory chips, further reducing latency and power consumption.

Constructed with **high-reliability SK Hynix memory chips**, these modules are built to withstand extreme operating conditions, featuring **low-power consumption** and **thermal efficiency** to support 24/7 server operations without overheating. The **115N** designation indicates a **16GB capacity per DIMM**, providing a substantial memory footprint for high-end server configurations while maintaining a compact form factor. The **RDIMM architecture** ensures compatibility with dual-channel memory controllers, enabling seamless scaling to multi-socket systems where performance and capacity are critical. Whether deployed in cloud data centers, HPC (High-Performance Computing) clusters, or large-scale enterprise deployments, these modules deliver the speed, endurance, and precision required to handle the most computationally intensive tasks with ease.

For administrators and IT professionals, the **SK Hynix HMCG788EBRA115N** and **HMCG79AEBRA115N** represent a premium investment in server memory, combining cutting-edge DDR5 technology with enterprise-grade reliability. Their optimized design ensures seamless integration into next-generation server architectures, making them an ideal choice for organizations seeking to future-proof their infrastructure while maximizing performance and efficiency.

### **Pros and Cons of Buying SK Hynix HMCG788EBRA115N (Samsung PC5-4800B 1Rx8 DDR5 ECC RDIMM Reg Server Memory) and HMCG79AEB115N**

1. **High Performance and Speed** Both modules support **DDR5-4800 (PC5-4800)** speeds, which is a significant upgrade from DDR4, offering better bandwidth and lower latency for server workloads. This is particularly useful for data-intensive applications, virtualization, and high-performance computing.

2. **Error Correction (ECC)** ECC memory is essential for servers, as it detects and corrects single-bit errors, preventing data corruption. This is critical for maintaining data integrity in mission-critical environments.

3. **Registered (RDIMM) Design** RDIMMs are optimized for multi-channel server architectures, reducing signal integrity issues and improving stability in high-channel-count systems. They are also more cost-effective than LRDIMMs for many server configurations.

4. **Compatibility with Modern Servers** These modules are designed for **Samsung s server platforms**, ensuring compatibility with their latest server motherboards and chipsets. This reduces the risk of compatibility issues compared to generic or third-party memory.

5. **Reliability and Stability** SK Hynix is a well-established DRAM manufacturer with a strong reputation for quality control. Samsung s integration ensures that the memory is thoroughly tested for server-grade reliability.

6. **Scalability** DDR5 allows for higher memory capacities per module (up to 128GB per rank in some configurations), enabling future-proofing for servers that may require more memory as workloads grow.

7. **Power Efficiency** DDR5 consumes less power per gigabyte compared to DDR4 at similar speeds, which can lead to lower operational costs in data centers.

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1. **Higher Cost Compared to DDR4** DDR5 memory is more expensive than DDR4, which may be a significant investment for budget-conscious server deployments. While the performance gains justify the cost for many use cases, smaller businesses or legacy systems may find this prohibitive.

2. **Limited Availability and Lead Times** DDR5 server memory, especially high-density modules like these, can have longer lead times due to high demand and supply chain constraints. Procurement may require advance planning.

3. **Not All Servers Support DDR5** If you are upgrading an existing server, ensure it has a **DDR5-compatible motherboard and chipset**. Some older or mid-range servers may still rely on DDR4, making these modules incompatible.

4. **Higher Voltage Requirements** DDR5 operates at **1.1V per rank** (compared to DDR4 s 1.2V), but the overall power draw can still be higher in multi-rank configurations. This may require careful power supply planning in some systems.

5. **Fewer Third-Party Options** Unlike DDR4, where third-party vendors offer a wide range of compatible memory, DDR5 server memory from major brands like Samsung and SK Hynix is often proprietary or tightly integrated. This can limit flexibility if you need to mix and match vendors.

6. **Potential for Overkill in Low-End Servers** If you are running lightweight workloads (e.g., small-scale virtualization or basic file servers), the performance gains of DDR5-4800 may not be necessary. In such cases, DDR4 modules could suffice at a lower cost.

7. **Firmware and BIOS Dependencies** Some DDR5 modules require updated BIOS or firmware to function optimally. If your server s firmware is outdated, you may need to update it, which could introduce temporary downtime.

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SK Hynix HMCG788EBRA115N and HMCG79AEB115N (Samsung PC5-4800B DDR5 ECC RDIMM) are **high-quality, performance-oriented server memory modules** that offer significant advantages for modern server workloads. Their **DDR5 speed, ECC protection, and registered design** make them ideal for data centers, virtualization environments, and high-performance computing. However, their **higher cost, potential compatibility issues, and limited third-party options** may not make them suitable for all use cases.

If you are deploying a **new Samsung-based server platform** or upgrading to a **DDR5-compatible system**, these modules are an excellent choice. For **legacy systems or budget-sensitive deployments**, DDR4 may still be a more practical option.

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- You are deploying a **new Samsung server** with DDR5 support.

- Your workloads are **data-intensive** (e.g., databases, virtualization, AI/ML, or high-performance computing).

- You prioritize **reliability, error correction, and long-term scalability**.

- You can justify the **higher upfront cost** with performance gains.

- Your server **does not support DDR5** (stick with DDR4).

- You are working with a **tight budget** and can achieve similar performance with lower-cost DDR4 modules.

- You need **mix-and-match flexibility** and prefer third-party vendors (though Samsung/SK Hynix are still reliable choices).

- Your workloads are **lightweight** and do not require DDR5 s advanced features.

For most **enterprise or high-end server deployments**, these modules are a **strong recommendation** due to their performance, reliability, and compatibility with Samsung s ecosystem. However, always verify **server compatibility** and **BIOS/firmware requirements** before purchasing.

Details:

It features ECC memory and is registered, providing enhanced error correction performance. Made by SK Hynix, this module has a total capacity of 16GB divided into one module, with bus speed PC5-38400 DDR5-4800. The product is a single Samsung 16GB DDR5 ECC RDIMM server memory module, designed for high performance and reliability in environments. The module has 288 pins and is manufactured in Vietnam, catering to the needs of enterprise networking server components.

part #: hmcg788ebra115n prices

• $315.00-$349.00

specifications servermemor:

• brand: Sk Hynix
• mpn: Hmcg788ebra115n
• form factor: Rdimm
• type: Ddr5 Ec8
• total capacity: 16 Gb
• number of pins: 288
• bus speed: Pc5-38400
• country of origin: Vietnam
• memory features: Ecc Memory, Registered

general servermemor:

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

returns servermemor:

• policy: No Returns

offer servermemor:

• availability: In Stock
• quantity: 6
• options: Ship-to-home
• sold: 0
• best offers: True
• started: May 17, 2026

shipping servermemor:

• service: USPS Ground Advantage
• transit: 4-9 Days
• type: Calculated
• class: Standard
• cost: $8.75
• carrier: USPS

seller servermemor:

• rating: 100.0%
• # reviews: 1699
• city: San Jose, California

payments servermemor:

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

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