HPE 803660-091 Sk Hynix Dimm 8GB HMA81GU7MFR8N-TF DDR4 PC4-2133ECC

( Brand: Hpe ), ( Manufacturer Part Number: 803660-091 ), ( Model: HMA81GU7MFR8N ), ( Form Factor: Dimm ), ( Type: Ecc Ram ), ( Total Capacity: 8 Gb ), ( Number Of Pins: 240 ), ( Bus Speed: Pc4-17000 ), ( Memory Features: Ecc Memory )

Review HPE Sk Hynix 8gb Ddr4 Dimm

The **SK Hynix HMA81GU7MFR8N-TF 8GB DDR4 PC4-2133ECC DIMM** is a high-performance, low-latency memory module designed for enterprise-grade computing environments where reliability, speed, and stability are paramount. Part of SK Hynix s premium **HMA81GU7** series, this **8GB (1x8GB) DDR4-2133MHz ECC Registered DIMM** is engineered to meet the rigorous demands of data centers, high-performance workstations, and mission-critical servers. Built with **2133MHz (PC4-2133) DDR4** technology, it delivers sustained data transfer rates of up to **17.1 GB/s per module**, ensuring rapid processing and reduced latency in memory-intensive applications such as virtualization, database management, and scientific computing. The **ECC (Error-Correcting Code)** functionality provides an added layer of protection against data corruption, automatically detecting and correcting single-bit errors while flagging multi-bit errors for immediate intervention, which is essential for maintaining data integrity in fault-tolerant systems.

This module features **Registered (Buffered) DIMM architecture**, which helps mitigate signal integrity issues on high-channel-count motherboards by buffering the command and address signals, thereby reducing electromagnetic interference (EMI) and improving overall system stability. The **TF (Tactical Frequency) designation** indicates that this module is optimized for consistent performance across a wide range of operating conditions, making it ideal for servers that may experience varying thermal loads or voltage fluctuations. Manufactured with **SK Hynix s advanced 16nm process technology**, the memory chips within this module ensure high density, energy efficiency, and long-term reliability, contributing to extended product lifecycles in demanding environments.

The **240-pin DIMM form factor** ensures compatibility with a broad spectrum of enterprise-grade motherboards, including those from Dell, HP, Lenovo, and other leading server manufacturers. Its **low-power design** adheres to **DDR4 s power-saving features**, including support for **DIMM-level power gating** and **auto-self-refresh (ASR)**, which helps reduce energy consumption without compromising performance. Additionally, the module is **CE, FCC, and RoHS compliant**, meeting stringent global regulatory standards for safety, electromagnetic compatibility, and environmental sustainability. Whether deployed in a **2U rack server, blade system, or high-end workstation**, this SK Hynix DDR4 DIMM delivers a robust balance of speed, endurance, and reliability, making it a trusted choice for organizations prioritizing performance and uptime.

The **SK Hynix HMA81GU7MFR8N-TF** (8GB DDR4 PC4-2133ECC DIMM) is a mid-range memory module designed for workstations, servers, and high-performance desktops. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **ECC Memory for Data Integrity**

The module supports **Error-Correcting Code (ECC)**, which is crucial for systems handling sensitive data, such as servers, workstations, or applications requiring reliability (e.g., virtualization, databases, or financial software). ECC detects and corrects single-bit errors, reducing the risk of data corruption.

2. **DDR4-2133 MHz Speed**

The **PC4-2133** designation translates to **DDR4-2133 MHz**, which is a balanced speed for most professional workloads. While not the fastest option (e.g., DDR4-3200 or DDR4-3600), it provides sufficient throughput for general business, office, and light-to-moderate gaming or content creation tasks without requiring extreme overclocking.

3. **Low Power Consumption**

DDR4-2133 modules typically consume **less power** than higher-speed variants (e.g., DDR4-3200 or DDR4-3600), which can contribute to lower system heat and energy costs useful for 24/7 server or workstation use.

4. **Compatibility with Mid-Range and High-End Platforms**

This module is designed for **Xeon, Ryzen Threadripper, EPYC, and some high-end Intel Core i7/i9** systems, making it versatile for both desktop and server builds. It is also backward-compatible with many **DDR4-2133 motherboards**, reducing upgrade risks.

5. **Reliability and Stability**

SK Hynix is a reputable manufacturer known for producing **stable and durable memory**. The module is likely to have undergone rigorous testing, reducing the likelihood of premature failure compared to cheaper, no-name brands.

6. **Cost-Effective for ECC Needs**

For users who **require ECC but do not need extreme speeds**, this module offers a **good balance of performance and price**. It is often cheaper than higher-speed ECC kits while still providing the necessary error correction.

7. **Unbuffered (UDIMM) Design**

While some server-grade ECC modules are registered (RDIMM/LRDIMM), this is an **unbuffered (UDIMM)** module, which simplifies installation in non-server desktop systems. It is also more cost-effective than registered variants for most desktop applications.

8. **Long-Term Availability**

As a widely used part number, this module is **easily replaceable** and should remain available for several years, reducing the risk of obsolescence.

---

### **Cons**

1. **Not Suitable for High-End Gaming or Extreme Overclocking**

DDR4-2133 is **not the fastest option** available. Gamers or enthusiasts pushing high refresh rates (e.g., 144Hz monitors) or running extreme overclocks may benefit more from **DDR4-3200, DDR4-3600, or DDR5** modules. The speed limitation could become a bottleneck in latency-sensitive applications.

2. **Limited Overclocking Headroom**

Unlike higher-speed DDR4 modules, this one has **less potential for manual overclocking**. Users looking to push memory speeds beyond 2133 MHz will need a different kit.

3. **Higher Latency Compared to Faster Modules**

While DDR4-2133 is sufficient for most workloads, it has **higher CAS latency** (typically **CL15 or CL17**) compared to faster modules (e.g., DDR4-3200 with CL16 or CL18). This can slightly impact performance in memory-intensive tasks, though the difference is often negligible for non-professional use.

4. **Potential Bottleneck in Multi-Channel Systems**

If paired with a **CPU that supports higher memory speeds** (e.g., Ryzen 9 5950X, Intel Core i9-13900K), the DDR4-2133 modules may **limit overall system performance** due to the memory bottleneck. In such cases, upgrading to faster RAM (e.g., DDR4-3600) could yield better results.

5. **Not Ideal for Future-Proofing**

While DDR4 is still widely used, **DDR5 is becoming the standard** for newer platforms (e.g., Intel 12th Gen , AMD Ryzen 7000 ). If the system is intended for long-term use, investing in DDR5 now (if budget allows) may be more future-proof.

6. **Slightly Higher Price Than Non-ECC DDR4**

ECC memory is **more expensive** than standard DDR4. If the application does **not require ECC** (e.g., gaming, general desktop use), a non-ECC DDR4-21300 or DDR4-3200 module would be a more cost-effective choice.

7. **Compatibility Issues with Some Motherboards**

Some **budget or older motherboards** may not support ECC memory, or they may require **BIOS updates** to recognize it properly. Always verify compatibility before purchase.

---

### **Conclusion**

The **SK Hynix HMA81GU7MFR8N-TF (8GB DDR4-2133ECC)** is an **excellent choice for users who prioritize reliability, data integrity, and professional workloads** (e.g., servers, workstations, virtualization, or database management). Its **ECC support, stability, and balanced speed** make it ideal for environments where **memory errors cannot be tolerated**.

However, if the use case involves **gaming, content creation with high-end GPUs, or extreme overclocking**, a **faster DDR4 or DDR5 module** (e.g., DDR4-3200/3600 or DDR5-4800) would be more beneficial. Similarly, users who **do not need ECC** (e.g., general desktop or budget builds) may find a **non-ECC DDR4 module** to be a better value.

---

### **Recommendation**

- You need **ECC memory** for a **server, workstation, or professional application**.

- Your system **supports DDR4-2133** and you do not require extreme memory speeds.

- You prioritize **reliability and data integrity** over raw performance.

- You are working within a **budget** where higher-speed ECC modules are not feasible.

- You are building a **high-end gaming PC** or need **faster memory speeds** (opt for DDR4-3200/3600 or DDR5).

- Your use case **does not require ECC** (non-ECC DDR4 may suffice).

- You plan to **future-proof** your system and can afford **DDR5 memory**.

- Your CPU **supports higher memory speeds**, and you want to avoid a bottleneck (e.g., pairing with DDR4-3600 instead).

For most **business, office, or professional desktop users**, this module is a **solid, cost-effective choice**. For **gamers or enthusiasts**, investing in faster memory may provide better long-term performance. Always ensure **motherboard compatibility** before purchasing.

Details:

SK Hynix 8GB DDR4-2133 ECC MemoryHMA81GU7MFR8N-TF HPE 803660-91 PC4-2133P-ED1-11 Pulled from working environment.

part #: 803660091 prices

• $68.79-$396.00

specifications servermemor:

• brand: Hpe
• mpn: 803660-091
• model: Hma81gu7mfr8n
• form factor: Dimm
• type: Ecc Ram
• total capacity: 8 Gb
• number of pins: 240
• bus speed: Pc4-17000
• memory features: Ecc Memory

seller servermemor:

• # reviews: 96
• rating: 100.0%
• city: Wentzville, Missouri

offer servermemor:

• options: Ship-to-home
• sold: 0
• best offers: True
• quantity: 2
• availability: In Stock
• started: March 1, 2026

returns servermemor:

• policy: No Returns

shipping servermemor:

• type: Calculated
• service: USPS Ground Advantage
• carrier: USPS
• class: Standard
• cost: $5.45
• transit: 5-11 Days

general servermemor:

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

payments servermemor:

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

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