HMCG88AGBRA186N Hynix 32GB PC5-44800 DDR5-5600MT/s 2Rx8 ECC Memory

Product Snapshot — Hynix HMCG88AGBRA186N 32GB Memory

High-performance server memory module engineered for enterprise and data-center workloads. The Hynix HMCG88AGBRA186N is a 32GB DDR5 SDRAM RDIMM offering PC5-44800 (DDR5-5600 / 5600MT/s) bandwidth with error-correcting code (ECC) for dependable data integrity.

Manufacturer & Part Details

Brand and Model

Maker: Hynix (SK Hynix)
Manufacturer Part Number (MPN): HMCG88AGBRA186N

Product Title

Hynix 32GB DDR5-5600 RDIMM ECC PC5-44800 — HMCG88AGBRA186N

Technical Specifications

Memory & Performance

• Storage Capacity: 32GB per module
• Memory Technology: DDR5 SDRAM
• Bus Speed: 5600MT/s (DDR5-5600 / PC5-44800)
• CAS Latency: CL46
• Module Count: 1 × 32GB
• Rank Configuration: 2Rx8 (dual-rank, x8)

Reliability & Signal Integrity

• Data Integrity Check: ECC (Error-Correcting Code)
• Signal Processing: Registered (RDIMM) buffer for stable signaling
• Designed for: Enterprise-grade fault tolerance and uptime

Key Highlights

• Capacity: 32GB single module (1 × 32GB)
• Memory type: DDR5 SDRAM — next-generation memory standard
• Speed: DDR5-5600 / 5600MT/s (PC5-44800)
• Error correction: ECC for enhanced reliability in servers and workstations
• Topology: Registered (RDIMM) with 288-pin connector
• Latency: CAS CL46 for balanced throughput and responsiveness
• Rank: 2Rx8 configuration optimized for multi-rank platforms
• Ideal use: Datacenter, virtualization, database servers, high-availability systems

Physical & Shipping Details

Form Factor

288-pin RDIMM — industry-standard physical layout for server motherboards and compatible memory sockets.

Package Dimensions

• Shipping Height: 1.00 inch
• Shipping Depth: 6.75 inches

Use Cases

• Server-class motherboards that support DDR5 RDIMM modules
• High-density virtualization hosts and clustered database servers
• Workloads that require ECC for mission-critical data protection
• Next-gen DDR5 throughput for higher memory bandwidth
• ECC and registered buffering reduce risk of memory errors
• 32GB capacity per stick enables larger memory pools with fewer modules
• From a trusted manufacturer (Hynix) known for DRAM reliability

Hynix HMCG88AGBRA186N 32GB DDR5 ECC Memory

In the realm of enterprise computing, cloud infrastructure, and high-performance workstations, memory is not just a component—it is the cornerstone of stability, integrity, and speed. The Hynix HMCG88AGBRA186N 32GB PC5-44800 DDR5-5600MT/s 2Rx8 ECC Memory module represents the pinnacle of this philosophy. Designed for servers, storage arrays, and professional-grade systems that cannot tolerate data corruption, this module combines the raw bandwidth of DDR5 with the essential reliability of Error-Correcting Code (ECC). It is a vital upgrade or replacement part for IT administrators, system builders, and OEMs demanding uncompromising performance for their mission-critical applications.

Unpacking the Specifications: What PC5-44800 DDR5-5600MT/s 2Rx8 ECC Means

Understanding the alphanumeric designation of this Hynix module is key to appreciating its capabilities. Each segment of its name describes a critical attribute that defines its place in the server memory hierarchy.

DDR5 Architecture: The Foundation of Next-Gen Speed

DDR5 memory is a revolutionary leap from its DDR4 predecessor. It operates at a lower standard voltage (1.1V) while delivering significantly higher data rates and improved efficiency. Key architectural advancements include the division of the memory channel into two independent 32-bit sub-channels. This allows for more efficient data handling and reduces latency for concurrent operations, a crucial benefit for multi-threaded server workloads. Furthermore, DDR5 integrates on-die ECC (not to be confused with module-level ECC) for internal data integrity, and features a more robust power management system with the Power Management IC (PMIC) located on the module itself, ensuring cleaner and more stable power delivery.

Breaking Down the Data Rate: 5600MT/s

The "5600MT/s" specification stands for 5600 Megatransfers per second. This is the speed at which the memory module can perform data operations on its bus. A higher MT/s rating directly translates to higher potential bandwidth, enabling faster data movement between the CPU and memory. This speed is essential for data-intensive tasks such as in-memory databases (like SAP HANA), scientific simulations, and virtualization hosts running numerous virtual machines.

Understanding the PC5-44800 Classification

The "PC5-44800" is the module's industry-standard designation, where "PC5" indicates it is a DDR5 module. The number "44800" refers to the module's approximate peak transfer rate in megabytes per second (MB/s). Calculated as (5600 MT/s * 8 bytes per transfer * 2 for dual-channel-like effect due to sub-channels), it offers a theoretical peak bandwidth of nearly 44.8 GB/s per module. This immense bandwidth helps alleviate bottlenecks in systems with powerful multi-core processors.

The Critical Role of ECC: Error-Correcting Code Memory

ECC is the defining feature that separates standard consumer memory from true server-grade memory. It is a non-negotiable requirement for systems where data accuracy is paramount.

How ECC Protects Your Data

Cosmic rays, electrical noise, and other subtle physical phenomena can cause random bit flips in memory—a "1" becomes a "0" or vice-versa. In a non-ECC system, this corrupted data is passed to the CPU, potentially causing silent data corruption, application crashes, or system instability. ECC memory includes extra memory chips on the module that store a special code. Every time data is written to memory, the ECC algorithm calculates a code for that data block. When the data is read, the code is recalculated and compared. If a single-bit error is detected, ECC circuitry corrects it instantly and transparently. It can also detect (though not correct) multi-bit errors, alerting the system to a more serious problem. This capability is essential for financial transactions, medical records, scientific data, and any long-term storage server (like NAS or SAN).

Module Organization: 2Rx8 Configuration

The "2Rx8" descriptor details the physical and logical layout of the memory chips on the module. "2R" means the module is dual-ranked. A rank is a set of DRAM chips that work together to form a data width (typically 64 bits for ECC, 72 bits with ECC bits included). A dual-rank module has two such sets, which can be accessed independently, improving memory controller efficiency by interleaving accesses between the ranks. The "x8" refers to the organization of the individual DRAM chips, meaning they have an 8-bit wide data interface. x8-based modules are a standard and optimized configuration for server platforms, often offering better compatibility and performance characteristics than x4 or x16 designs in ECC environments.

Primary Applications and System Compatibility

The Hynix HMCG88AGBRA186N is not designed for consumer PCs. Its ecosystem is the data center, the render farm, and the engineering lab.

Target Server Platforms and OEM Use

This module is engineered for compatibility with modern server platforms from leading manufacturers such as Dell (PowerEdge series), HPE (Proliant series), Lenovo (ThinkSystem series), and Supermicro, among others. It is crucial to verify the specific memory QVL (Qualified Vendor List) for your server model to ensure compatibility, as BIOS and chipset limitations can vary. Furthermore, Hynix is a leading OEM supplier; this exact module or its equivalents are often found as the original installed memory in servers from these major brands, making it a perfect and reliable replacement or expansion option.

Technical Advantages and Performance Insights

Beyond the specifications sheet, this Hynix module delivers tangible benefits derived from its high-quality construction and advanced design.

Enhanced Stability and Signal Integrity

The DDR5 standard mandates a more robust design. The on-module PMIC provides superior voltage regulation compared to relying on the motherboard, reducing noise and improving stability under heavy loads. The physical PCB (Printed Circuit Board) is designed with meticulous attention to trace routing and signal termination to maintain integrity at high speeds of 5600MT/s, ensuring reliable operation in thermally challenging server environments where airflow is consistent but ambient temperatures can be higher than in desktop settings.

Capacity and Bandwidth Scaling in Modern Systems

A single 32GB module provides a substantial building block for total system memory. Modern server platforms with 8, 12, or 16 memory slots per CPU can achieve enormous total capacities (512GB, 768GB, 1TB+) using modules of this density. The 5600MT/s speed ensures that as you add more channels and more CPUs (in multi-socket configurations), the aggregate memory bandwidth scales impressively, preventing the memory subsystem from becoming a bottleneck for the latest generations of Intel Xeon Scalable or AMD EPYC processors, which feature numerous memory channels to feed their high core counts.

Comparing to DDR4 and Lower-Speed DDR5

Upgrading from a mainstream DDR4-3200 ECC module to this DDR5-5600 ECC module offers a dramatic increase in theoretical bandwidth—over 75% per module. Even compared to entry-level DDR5-4800 ECC memory, the 5600MT/s speed provides a meaningful performance uplift for bandwidth-sensitive applications. This translates to faster data processing, quicker response times for queries, and the ability to support more concurrent users or VMs.

Assured Quality and Reliability

Hynix (SK hynix) is one of the world's top three DRAM manufacturers. They control the entire production process, from silicon wafer fabrication to final module assembly. This vertical integration guarantees that every component meets their stringent standards. The modules undergo rigorous testing at extreme temperatures and under continuous load before leaving the factory, ensuring they can withstand the 24/7 operational demands of a data center.