HMA82GR7DJR8N-VK Hynix 16GB DDR4 2666Mhz PC4-21300 ECC Reg 288Pin Server RAM

Hynix HMA82GR7DJR8N-VK 16GB DDR4 Server Memory

The Hynix HMA82GR7DJR8N-VK represents a pinnacle of server-grade memory technology, engineered for demanding data center and enterprise applications. This 16GB module operates at a base frequency of 2666MHz, aligning with the PC4-21300 classification, which denotes a peak transfer rate of 21,300 MB/s. This high bandwidth is critical for alleviating data bottlenecks in server environments where multiple processors and virtual machines compete for memory resources.

Capacity:16GB

Benefits of Registered Memory in Server Environments

By reducing the electrical load, registered memory allows a single memory controller to support a significantly larger number of memory modules per channel. This is why servers can be populated with vast amounts of RAM (often exceeding 1TB) across multiple CPUs. This scalability is fundamental to building high-capacity, high-availability servers for virtualization, large-scale databases, and in-memory computing applications, where unbuffered (UDIMM) memory would be physically and electrically incapable of such scaling.

288-Pin DDR4 DIMM Structure

The module conforms to the standard 288-pin Dual In-line Memory Module (DIMM) layout specified for DDR4 technology. The physical notch on the connector is placed differently than on DDR3 modules, preventing accidental insertion into an incompatible motherboard slot. The 1.2V operating voltage is a significant reduction from DDR3's 1.5V, contributing to lower power consumption and reduced heat output across the entire server rack.

DDR4 2666MHz (PC4-21300) vs. Memory

While higher frequency DDR4 modules exist (e.g., 2933MHz, 3200MHz), 2666MHz remains a widely adopted and cost-effective sweet spot for many server platforms. It offers a substantial performance uplift over entry-level 2133MHz and 2400MHz modules without the significant cost premium and potential compatibility constraints of the highest-tier speeds. For many workloads, the difference in real-world application performance between 2666MHz and 3200MHz is minimal compared to the impact of other system components like storage and network.

ECC Registered vs. Other DDR4 Types

It is vital to distinguish this module from other DDR4 types: UDIMM (Unbuffered): Consumer-grade, no ECC or Register. Not suitable for most servers. ECC UDIMM (Unbuffered ECC): Used in some entry-level servers and workstations; has ECC but lacks a register, limiting maximum capacity per channel. LRDIMM (Load Reduced): Uses a memory buffer (iMB) instead of a register, further reducing electrical load and enabling the very highest memory capacities, but at a higher cost and latency than RDIMMs. The Hynix HMA82GR7DJR8N-VK, as an ECC RDIMM, provides the ideal balance of performance, capacity, reliability, and cost for the vast majority of enterprise servers.

Reliability

Servers are designed to operate continuously, often running critical applications and services. The Hynix HMA82GR7DJR8N-VK ECC Reg DDR4 module is built to withstand the demanding conditions of server environments, ensuring long-term reliability and durability. With features like error correction code (ECC) and robust construction, this memory module can perform reliably for extended periods, minimizing downtime and ensuring uninterrupted operation.

Compatibility 

The Hynix HMA82GR7DJR8N-VK is designed for servers and workstations that require ECC Registered DDR4 memory. It is compatible with a wide range of platforms from major OEMs, including Dell PowerEdge series (e.g., R740, R640), HPE ProLiant servers (e.g., DL380 Gen10), Cisco UCS servers, and super micro motherboards supporting Intel Xeon Scalable processors (e.g., Purley platform) and compatible AMD EPYC platforms. It is crucial to always consult your system's qualified vendor list (QVL) to ensure full compatibility and optimal performance.