HMCT04AEERA132N Hynix 128GB DDR5-4800MHz Memory

Hynix 128GB DDR5-4800MHz ECC RDIMM Memory

The Hynix HMCT04AEERA132N 128GB DDR5-4800MHz PC5-38400 CL46 ECC RDIMM is a cutting-edge memory module designed specifically for enterprise-class servers and high-performance workstations. This memory module harnesses the latest DDR5 technology, delivering significant improvements in bandwidth, power efficiency, and reliability compared to its DDR4 predecessors.

With a massive 128GB capacity per module, this RDIMM (Registered DIMM) is tailored for large-scale data center environments, virtualization, and mission-critical applications requiring enormous memory pools. It supports ECC (Error-Correcting Code), providing automatic correction of data corruption to ensure data integrity and uptime.

DDR5-4800MHz Speed and Performance

Operating at a blazing DDR5-4800MHz frequency, the Hynix HMCT04AEERA132N provides a data transfer rate of up to 38.4 GB/s (PC5-38400). This high clock speed ensures faster data processing and lower latency, enhancing overall system responsiveness and throughput.

DDR5 technology introduces improvements such as doubled bank groups and burst length, allowing more data to be processed per clock cycle. This effectively optimizes performance for workloads like database management, real-time analytics, AI, and scientific simulations.

128GB Module Capacity

The substantial 128GB capacity per DIMM is a game-changer in scaling memory-intensive workloads. Enterprises leveraging virtualization, in-memory databases, or large-scale SAP HANA deployments benefit from this large capacity module by minimizing the number of memory slots required, reducing complexity and power consumption.

ECC (Error-Correcting Code)

ECC technology is critical in server environments where data integrity is paramount. The Hynix HMCT04AEERA132N employs ECC to detect and correct single-bit memory errors automatically, which prevents data corruption and system crashes. This feature significantly improves system reliability and availability.

Registered DIMM (RDIMM) Architecture

The RDIMM architecture includes an additional register between the DRAM modules and the memory controller, buffering and stabilizing electrical signals. This allows for higher memory densities and better signal integrity, especially in multi-channel server environments where many DIMMs are populated.

By reducing electrical load on the memory controller, RDIMMs enable servers to maintain stable performance under heavy memory loads, making the Hynix HMCT04AEERA132N ideal for enterprise-grade servers.

Technical Deep Dive

Latency and Timing: CL46

The module features a CAS latency (CL) of 46, which is typical for high-capacity DDR5 RDIMMs running at 4800MHz. While latency is slightly higher than lower-capacity or slower modules, the improved bandwidth and advanced architecture of DDR5 compensate by delivering better overall performance in server workloads.

Power Efficiency and Voltage Specifications

DDR5 memory reduces voltage to 1.1V compared to 1.2V in DDR4, resulting in lower power consumption per module. This is especially beneficial when deploying large memory arrays, as it reduces heat output and energy costs in data centers.

The Hynix HMCT04AEERA132N also incorporates on-die ECC and power management ICs (PMICs), further enhancing power efficiency and reliability during high-speed operation.

Module Form Factor and Compatibility

This module comes in the standard 288-pin DIMM form factor compatible with most modern server platforms supporting DDR5 memory. It is designed to meet JEDEC standards, ensuring broad interoperability across vendors like Dell, HPE, Lenovo, and Supermicro.

However, it's essential to verify motherboard and CPU support for DDR5 RDIMMs before deployment, as DDR5 support is still emerging in many server product lines.

Use Cases

Enterprise Servers and Data Centers

The primary application of the Hynix HMCT04AEERA132N memory module is in enterprise-grade servers powering cloud infrastructures, virtualization farms, and large-scale databases. Its large capacity and ECC support provide the robustness required to handle extensive workloads with high uptime demands.

High-Performance Computing (HPC)

HPC environments benefit from DDR5 memory's increased bandwidth and efficiency. Scientific simulations, weather modeling, and genomic research require fast, large memory pools, which the Hynix module can effectively provide.

Virtualization and Containerized Environments

Virtualized infrastructures running multiple VMs or containers require substantial memory to allocate sufficient resources for each virtual instance. This 128GB DDR5 RDIMM enables system architects to maximize density and efficiency.

Reliability, Availability, and Serviceability (RAS) Features

Error Detection and Correction

Beyond basic ECC, the module supports advanced error detection mechanisms like Chipkill, which can correct multi-bit errors across multiple DRAM chips, dramatically increasing fault tolerance.

The module integrates thermal sensors that enable real-time temperature monitoring. Coupled with intelligent server firmware, this allows proactive thermal management, preventing overheating and extending the module's lifespan.

SPD (Serial Presence Detect) and Firmware

The SPD EEPROM stores detailed module information and timing parameters that the server BIOS reads during POST (Power-On Self-Test). This ensures that the memory module operates at optimal timings for the specific platform.

Compatibility 

Ensure the server motherboard firmware is updated to the latest version supporting DDR5 RDIMM memory. BIOS updates often include enhanced memory compatibility and stability fixes.

Memory Population Rules

Follow the vendor’s guidelines for populating DIMM slots in balanced configurations to maximize performance and minimize latency. Using identical modules like the Hynix HMCT04AEERA132N across channels is recommended.

Mixing Memory Modules

Mixing different memory capacities, speeds, or types (DDR4 with DDR5, RDIMM with LRDIMM) is generally not supported and can cause instability or system failure. Always use matched modules when upgrading or expanding memory.