SK HYNIX HMA81GR7MFR8N-UH-TD Server Ram 4-SK 8GB PC4-2400T-RD1

( Brand: Sk Hynix ), ( Manufacturer Part Number: HMA81GR7MFR8N-UH-TD ), ( Total Capacity: 32 Gb ), ( Capacity Per Module: 8 Gb ), ( Item Length: 5 1/4 ), ( Memory Features: Ecc Memory, Registered ), ( Form Factor: Rdimm ), ( Type: Ddr4 Sdram ), ( Item Height: 1 1/4 ), ( Number Of Pins: 288 ), ( Bus Speed: Pc4-19200 )

Review SK HYNIX 4-sk 8gb 1r Server Ram

The **SK Hynix HMA81GR7MFR8N-UH-TD 4-SK 8GB 1Rx8 PC4-2400T-RD1 Server RAM** is a high-performance, low-latency memory module engineered specifically for demanding server environments where reliability, speed, and efficiency are paramount. This **DDR4 ECC Registered (RDIMM) module** delivers exceptional performance with a **2400MHz operational frequency**, optimized for seamless data processing in enterprise-grade servers, workstations, and high-performance computing (HPC) systems. Each module consists of **two 4GB DDR4 SDRAM chips**, arranged in a **1Rx8 configuration**, ensuring balanced memory density and compatibility with a wide range of server platforms that support registered memory architectures.

Designed with **ECC (Error-Correcting Code) technology**, this RAM module actively detects and corrects single-bit errors, significantly enhancing data integrity and reducing the risk of system crashes or corrupted data critical for mission-critical applications such as databases, virtualization, and financial transaction processing. The **Registered (RDIMM) design** further improves stability by buffering commands from the CPU, minimizing signal interference and allowing for higher memory channel densities in multi-socket server configurations. This makes it an ideal choice for **scalable server setups** where multiple DIMMs are installed across multiple slots, ensuring consistent performance and reduced latency.

Built with **SK Hynix s advanced manufacturing processes**, this module incorporates **low-power, high-density DRAM chips** that operate efficiently while maintaining peak performance. The **PC4-2400T designation** indicates a **2400MHz data rate with a tight timing profile (RD1)**, meaning it achieves faster data transfer speeds with optimized latency, making it well-suited for applications requiring rapid memory access, such as real-time analytics, AI workloads, and high-frequency trading systems. The **T (Tight) timing variant** ensures that the module adheres to strict latency specifications, providing predictable and reliable performance under heavy workloads.

Compatibility is a key strength of this RAM module, as it adheres to **JEDEC standards** and is designed to work seamlessly with a broad spectrum of **Intel Xeon and AMD EPYC-based servers**, as well as other enterprise-grade platforms that support DDR4 RDIMMs. The **288-pin SODIMM form factor** ensures proper seating and secure installation, while the **unbuffered (non-registered) alternative is not applicable here**, reinforcing its role in high-channel-count server configurations. Additionally, the module is **fully compatible with memory controllers that support DDR4-2400 speeds**, making it a versatile upgrade option for both new and existing server infrastructures.

For data centers and IT administrators prioritizing **scalability and uptime**, this SK Hynix RAM module offers a robust solution that balances speed, reliability, and efficiency. Whether deployed in **virtualized environments, cloud computing infrastructures, or high-performance computing clusters**, its **ECC protection, low-latency performance, and registered architecture** ensure that critical operations run smoothly without compromise. With a focus on **enterprise-grade durability and performance**, this module is a dependable choice for organizations demanding the highest standards in server memory technology.

### **Pros and Cons of Buying SK Hynix HMA81GR7MFR8N-UHTD (4x8GB, 1Rx8, PC4-2400T-RD1) Server RAM**

1. **High Capacity and Density** This module provides 32GB of DDR4 memory in a single 4x8GB configuration, which is useful for servers requiring moderate to high memory capacity without needing multiple slots.

2. **Registered (RDIMM) Design** As a Registered DIMM, it is optimized for server use, offering better stability and reduced load on the memory controller compared to unbuffered (UDIMM) modules.

3. **Low Voltage (1.2V) Operation** The module operates at 1.2V, which can improve power efficiency compared to higher-voltage alternatives, though this may vary depending on the server s power management.

4. **ECC Support** This is an ECC (Error-Correcting Code) module, which helps prevent data corruption by detecting and correcting single-bit errors, a critical feature for servers handling mission-critical workloads.

5. **Compatibility with DDR4-2400** The module runs at 2400MHz (PC4-2400), which is a common speed for server-grade memory, balancing performance and power efficiency.

6. **Reliability for Server Use** SK Hynix is a reputable manufacturer known for producing stable, high-quality memory modules suitable for enterprise and server environments.

7. **Single-Rank (1Rx8) Configuration** A single-rank design reduces latency compared to multi-rank modules, which can be beneficial for latency-sensitive applications.

8. **RDIMM Form Factor** This form factor is widely supported in enterprise servers, making it a versatile choice for upgrades or replacements.

1. **Limited Speed (2400MHz)** While 2400MHz is sufficient for many server workloads, it may not be optimal for high-performance computing (HPC) or memory-intensive applications that require faster speeds (e.g., DDR4-3200 or DDR5).

2. **No RDIMM Support in Some Servers** Some budget or older servers may not support RDIMMs, requiring UDIMMs instead. Always verify compatibility with your server s BIOS or documentation.

3. **Potential Latency in Multi-Socket Systems** In servers with multiple CPU sockets, memory bandwidth and latency can become bottlenecks, especially if the system is not properly configured for NUMA (Non-Uniform Memory Access) or has limited memory channels.

4. **Cost Relative to Higher-Speed Modules** While this module is reasonably priced for server-grade memory, higher-speed RDIMMs (e.g., DDR4-3600) may offer better performance for certain workloads at a slightly higher cost.

5. **No Load-Reduced (LRDIMM) Option** If your server supports LRDIMMs, these can offer higher capacity with lower power consumption, but this module is a standard RDIMM.

6. **Vendor-Specific Compatibility** Some server manufacturers (e.g., Dell, HP, Lenovo) may have proprietary memory requirements, so always check for compatibility with your specific server model.

---

The **SK Hynix HMA81GR7MFR8N-UHTD (4x8GB, 1Rx8, DDR4-2400T-RD1)** is a solid choice for servers requiring **reliable, ECC-protected memory** at a moderate speed. It strikes a balance between **capacity, stability, and cost**, making it suitable for:

- **General-purpose servers** (web hosting, database servers, virtualization).

- **Workstations or small-scale server setups** where 32GB is adequate.

- **Users upgrading existing servers** that support DDR4-2400 RDIMMs.

- **DDR4-3200 or DDR5 modules** for better performance.

- **LRDIMMs** if your server supports them for higher capacity with lower power draw.

- **Multi-rank or dual-rank modules** if your application benefits from increased memory bandwidth.

Always **verify compatibility** with your server s BIOS, motherboard, and CPU before purchasing.

---

- You need **32GB of reliable, ECC-protected memory** for a server.

- Your server supports **DDR4-2400 RDIMMs** and does not require higher speeds.

- You are working with **moderate workloads** (e.g., virtualization, small databases, web servers).

- You need **higher memory speeds** (e.g., DDR4-3200 or DDR5).

- Your server supports **LRDIMMs** for larger capacity with better power efficiency.

- You are running **memory-intensive applications** (e.g., large-scale databases, HPC workloads) where latency matters.

For most **enterprise or small-to-medium business servers**, this module is a **good, cost-effective choice**. Always cross-check with your server s documentation to ensure seamless integration.

Details:

Only servers works stations. Pulled from a working environment. YOU GET 4 MODULES/ four SK Hynix 8GB DDR4 SDRAM server RAM cards with a total capacity of 32GB. Each card has a capacity of 8GB and is designed in RDIMM form factor with 288 pins.

Ideal for use in servers, these memory cards provide reliable high-performance storage and processing capabilities.THESE ARE NOT COMPATIBLE WITH DESKTOP PC's. The bus speed of the memory cards is PC4-19200 DDR4-2400 and they are equipped with ECC Registered.

part #: hma81gr7mfr8nuh prices

• $21.99-$466.65

specifications servermemor:

• brand: Sk Hynix
• mpn: Hma81gr7mfr8n-uh-td
• total capacity: 32 Gb
• capacity per module: 8 Gb
• item length: 5 1/4
• memory features: Ecc Memory, Registered
• form factor: Rdimm
• type: Ddr4 Sdram
• item height: 1 1/4
• number of pins: 288
• bus speed: Pc4-19200

seller servermemor:

• # reviews: 2485
• city: Dearborn height, Michigan
• rating: 100.0%

offer servermemor:

• options: Ship-to-home
• quantity: 1
• availability: In Stock
• started: May 19, 2026
• sold: 0

general servermemor:

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

payments servermemor:

• credit card: Diners-club
• other
• wallet: Apple-pay

shipping servermemor:

• service: USPS Ground Advantage
• type: Fixed
• carrier: USPS
• transit: 3-8 Days
• cost: $0.00
• class: Standard

returns servermemor:

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

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