HMCG84AGBRA190N Hynix 32GB 288 pin Rdimm Memory Module

Understanding the Hynix HMCG84AGBRA190N DDR5 Memory

The Hynix HMCG84AGBRA190N represents a significant advancement in server memory technology, embodying the latest DDR5 specifications to deliver unprecedented performance, reliability, and efficiency for modern data center and enterprise server environments. This 32GB module is engineered to meet the rigorous demands of 24/7 server operation, providing the foundational memory bandwidth required for applications ranging from large-scale virtualization and in-memory databases to high-performance computing (HPC) and artificial intelligence workloads.

Core Specifications and Technological Profile

At its core, this module is defined by a set of precise technical specifications that dictate its performance envelope and compatibility. Operating at a data rate of 5600 Megatransfers per second (MT/s), often marketed as 5600MHz, it offers a substantial bandwidth increase over previous DDR4 generations. The part number, HMCG84AGBRA190N, follows Hynix's internal coding system, which denotes its specific performance profile, density, and form factor. Understanding these specifications is crucial for system architects and IT procurement specialists to ensure optimal integration into their server infrastructure.

Decoding the Part Number: HMCG84AGBRA190N

While manufacturer part numbers can be complex, they often reveal key attributes. In the Hynix HMCG84AGBRA190N, the "HMC" typically identifies it as a Hynix Memory Component. The "G84" may relate to the product family and technology (DDR5). The "A" often indicates a standard power profile, and the subsequent characters specify timing, density, and revision details. The "190N" at the end frequently correlates with the specific speed bin and module characteristics. For precise interpretation, always refer to the official Hynix data sheet, but this breakdown provides a general understanding of the information embedded within the product code.

The DDR5 Revolution in Server Memory

DDR5 SDRAM is not merely an incremental update but a fundamental architectural shift from DDR4. The Hynix HMCG84AGBRA190N leverages these innovations to deliver a new level of performance and power management, making it a cornerstone for next-generation servers.

Architectural Advancements Over DDR4

DDR5 introduces several key architectural changes. The most significant is the move to a dual sub-channel design within each DIMM. While this module is a single-rank module, its internal architecture is split into two independent 32-bit data sub-channels, which improves memory access efficiency and reduces latency for certain operations compared to the single 64-bit channel in DDR4. Furthermore, the command/address (CA) bus operates at a double data rate, similar to the data bus, which streamlines communication with the memory controller.

On-DIMM Power Management: The PMIC

A critical innovation in DDR5 is the integration of a Power Management Integrated Circuit (PMIC) directly onto the memory module. The Hynix HMCG84AGBRA190N features this PMIC, which transforms the 12V supply from the server motherboard to the required 1.1V VDD and other necessary voltages. This distributed power architecture offers superior power delivery, reduced noise, and more granular power management capabilities, leading to greater stability, especially during heavy load conditions common in server environments.

Bandwidth and Speed: PC5-44800 at 5600MT/s

The module's speed of 5600MT/s translates to a peak transfer rate of 44,800 MB/s per module (calculated as 5600 MT/s * 8 bytes = 44,800 MB/s). This is denoted by the industry standard designation PC5-44800. This substantial bandwidth allows the CPU to access data more rapidly, reducing processing bottlenecks and accelerating overall application performance for data-intensive tasks.

Target Applications and Use Cases

The Hynix HMCG84AGBRA190N is not a general-purpose memory module; it is purpose-built for specific, demanding computing environments.

Enterprise Servers and Data Centers

This is the primary domain for this memory module. It is designed for use in rackmount and blade servers from major OEMs like Dell, HPE, Lenovo, and Cisco, as well as white-box server solutions. In these environments, it provides the reliable, high-bandwidth memory necessary for running enterprise applications, middleware, and operating systems.

Virtualization and Cloud Infrastructure

Modern data centers rely heavily on virtualization platforms like VMware vSphere, Microsoft Hyper-V, and KVM. These platforms allow multiple virtual machines (VMs) to run on a single physical server. Each VM requires its own allocation of physical RAM. The high density (32GB per module) and large total capacity achievable with modules like the Hynix HMCG84AGBRA190N are essential for consolidating dozens or even hundreds of VMs onto a single host, improving hardware utilization and reducing total cost of ownership (TCO).

In-Memory Databases and Big Data Analytics

Applications such as SAP HANA, Oracle Exadata, and various NoSQL databases perform their operations primarily within system memory to achieve ultra-low latency data access. The speed (5600MT/s) and bandwidth (PC5-44800) of this Hynix module directly translate to faster query processing, real-time analytics, and quicker business intelligence insights, enabling organizations to make data-driven decisions more rapidly.

High-Performance Computing (HPC) and AI/ML

In scientific computing, engineering simulations, and AI model training, workloads are often massively parallel and memory-bandwidth-bound. The Hynix HMCG84AGBRA190N, when populated in multi-channel server configurations, provides the aggregate memory bandwidth required to feed multiple CPU cores simultaneously, minimizing idle time and accelerating time-to-solution for complex computational problems.

Comparing to Other Memory Types

It is important to distinguish this module from other types of memory to avoid incorrect procurement.

RDIMM vs. UDIMM and LRDIMM

UDIMM (Unbuffered DIMM): Used in desktops and laptops. Lacks a register, limiting capacity and scalability. Not suitable for servers with many DIMM slots.
RDIMM (Registered DIMM): The type of module described here. Uses a register to buffer signals, enabling higher capacities and better stability in multi-DIMM configurations. The standard for most enterprise servers.
LRDIMM (Load Reduced DIMM): Uses a memory buffer (iMB) for both data and command/address signals, further reducing the electrical load. Used for the very highest capacity memory configurations but typically with slightly higher latency and cost.

DDR5 vs. DDR4

Upgrading from DDR4 to DDR5 with a module like the Hynix HMCG84AGBRA190N provides a substantial leap. Key differences include: higher base speeds (4800MT/s+ for DDR5 vs. 3200MT/s for top-end DDR4), lower operating voltage (1.1V vs. 1.2V), the inclusion of on-DIMM PMIC, and the dual sub-channel architecture. However, DDR5 is not backward compatible; it requires a DDR5-specific motherboard and CPU.