HMT42GR7BMR4C-G7 Hynix 16GB DDR3 SDRAM Reg 240-Pin RAM PC3-8500 1066MHz

Product Overview of the Hynix 16GB DDR3 Registered Memory

The Hynix HMT42GR7BMR4C-G7 is a high-performance 16GB PC3-8500 DDR3 SDRAM module crafted for enterprise-grade servers and workstations. Designed with reliability and speed in mind, this Registered ECC RDIMM ensures smooth data handling for demanding computing environments.

General Information

Manufacturer Details

• Brand: Hynix
• Part Number: HMT42GR7BMR4C-G7
• Product Title: 16GB DDR3 SDRAM Registered Module

Technical Specification

Memory Capacity & Technology

• Total Capacity: 16GB
• Technology Type: DDR3 SDRAM
• Module Count: 1 x 16GB RDIMM

Performance

• Speed Rating: 1066MHz
• Memory Standard: DDR3-1066 / PC3-8500
• CAS Latency: CL7
• Rank Configuration: Quad Rank x4

Electrical & Form Factor

• Voltage Required: 1.5V
• Pin Count: 240-Pin
• Form Factor: RDIMM (Registered DIMM)

Error Correction & Signal Processing

• ECC Support: Yes (Error-Correcting Code)
• Registered Memory: Yes

Compatibility

The Hynix HMT42GR7BMR4C-G7 is specifically engineered for systems that require **DDR3 Registered ECC memory**. It is not compatible with standard desktop PCs using unbuffered memory.

System Categories

• Enterprise Servers
• Rack & Tower Workstations
• Data Center Platforms
• Virtualization Hosts (VMware, Hyper-V, Proxmox)
• DDR3 RDIMM Slots
• ECC Memory Support
• Quad-Rank x4 Module Compatibility
• 1.5V DDR3 Server Memory Voltage

The Hynix 16GB PC3-8500 1066MHz DDR3 SDRAM 240-Pin RAM

The Hynix HMT42GR7BMR4C-G7 16GB PC3-8500 1066MHz DDR3 SDRAM Registered 240-Pin RAM module represents an important category of enterprise-grade memory designed specifically for servers and workstation systems. This type of memory is part of the broader family of DDR3 server RAM, with a focus on stability, efficient load management, and consistent performance across demanding environments. In data centers, business networks, and mission-critical computing setups, this memory plays a central role. The category emphasizes not only capacity and bandwidth but also the advantages of registered (buffered) architecture, ECC functionality, reduced electrical load, and long-term reliability under heavy workloads.

Products within this category, including the HMT42GR7BMR4C-G7 module, serve organizations that need high-density RAM configurations while ensuring system uptime. Servers running virtualization platforms, database systems, ERP applications, virtual desktop infrastructure (VDI), network management software, and distributed computing frameworks rely heavily on this type of memory. As a result, the category remains significant for businesses that demand dependable performance and minimal downtime. This page explores every aspect of the Hynix DDR3 Registered PC3-8500 memory type, including module specifications, architecture features, application scenarios, advantages, compatibility considerations, and upgrade guidance.

DDR3 Registered ECC Server Memory

DDR3 Registered ECC server memory modules, such as the Hynix HMT42GR7BMR4C-G7, belong to a specialized memory class engineered to support servers that process large amounts of data with accuracy and stability. Registered memory reduces the electrical load on the memory controller by placing a register between the DRAM modules and the system’s main memory controller. ECC (Error-Correcting Code) technology detects and corrects data errors in real time, an essential feature for enterprise environments where even a minor data error can compromise operations.

The PC3-8500 classification corresponds to a memory speed of 1066MHz, which, while not the fastest DDR3 speed, is highly favored in older generation servers built for reliability over raw speed. Many servers optimized for DDR3 memory were engineered around these stable frequencies, which help maintain cooler operating temperatures and reduced power consumption. This balance of performance and efficiency keeps PC3-8500 DDR3 Registered memory relevant even today for organizations maintaining legacy or long-term server infrastructure.

The Hynix HMT42GR7BMR4C-G7 Module

Hynix memory modules are known worldwide for reliability, longevity, and compatibility with major server brands. The HMT42GR7BMR4C-G7 model is a 16GB RDIMM that offers high capacity in a single module, making it suitable for scaling memory in servers that support large workloads. Because many enterprise systems rely on consistent and predictable memory behavior, this Hynix DDR3 Registered module fits perfectly into scenarios requiring dependable multitasking, continuous data processing, and error-free computing.

Technical of the Hynix HMT42GR7BMR4C-G7 DDR3 RDIMM

To understand the full value of this memory category, it is helpful to examine the technical architecture behind the module. Registered DDR3 ECC memory is engineered to deliver improved electrical stability and data consistency across multiple channels and memory banks. The HMT42GR7BMR4C-G7 model features multiple DRAM chips arranged to optimize signal flow and temperature distribution. The register component buffers commands from the memory controller, preventing overload when multiple modules operate in multi-channel setups.

Memory Speed

With a speed rating of 1066MHz, PC3-8500 DDR3 memory offers a bandwidth of approximately 8.5GB/s per module. While this speed may seem modest compared to modern memory standards, it was designed for balanced throughput in earlier generation enterprise servers that focused on reliability. The lower frequency helps minimize heat generation, reduce the risk of signal noise, and enhance long-term stability.

Latency and Controller

DDR3 Registered modules maintain stable memory timings, even when multiple DIMMs are installed. In servers where multiple RDIMMs operate simultaneously, latency stability becomes more important than achieving the lowest random-access latency. The register buffer in the Hynix HMT42GR7BMR4C-G7 ensures that the memory controller receives organized and buffered instructions, improving consistency and reducing timing conflicts.

Error Correction and Data Protection

ECC memory can correct single-bit errors and detect multi-bit errors. This is critical in large server environments that run continuously. Without ECC, memory errors caused by electrical interference, voltage fluctuations, or cosmic rays could lead to corrupted data, application crashes, or complete system failures. The HMT42GR7BMR4C-G7 module is specifically built for environments where data accuracy must be guaranteed, such as financial services applications, medical systems, virtualization servers, and military systems.

Use Cases

The Hynix HMT42GR7BMR4C-G7 module fits into numerous scenarios where stability, accuracy, and scalability are essential. These modules support legacy server platforms still used for specialized workloads that do not require the latest memory technology but do require dependability. Many organizations continue to rely on DDR3-based servers because the hardware remains robust, cost-effective, and suitable for internal business systems.

Server Virtualization and Cloud

Virtualization servers require large memory capacities to support multiple virtual machines simultaneously. A 16GB RDIMM such as the HMT42GR7BMR4C-G7 allows administrators to expand server memory efficiently. Although modern clusters typically use DDR4 or DDR5, DDR3-based virtual hosts remain active in companies that manage mid-range virtualization environments or private cloud setups with moderate resource requirements.

Database Server Environments

Database servers, including SQL, NoSQL, and in-memory databases, depend heavily on system memory. Registered ECC memory ensures that queries, transactions, and cached operations run smoothly without corruption. Even small errors in a database environment can cause significant business disruption. Thus, the Hynix DDR3 Registered memory category remains relevant for legacy database systems that continue to operate reliably on DDR3 platforms.

Enterprise Networking Services

Many network appliances, firewalls, monitoring systems, and directory servers use older DDR3 server configurations. Memory quality is essential for maintaining logs, network sessions, security processes, and user authentication. Because these systems require continuous uptime, ECC Registered RAM ensures that memory operations remain reliable. It also supports multi-threaded operations that are common in networking applications.

Multi-Channel Memory

DDR3 server motherboards frequently support dual-channel, triple-channel, or even quad-channel memory configurations. For optimal performance, memory modules should be installed in matching sets. The Hynix HMT42GR7BMR4C-G7 module is often used in pairs, trios, or larger sets to achieve balanced memory distribution and maximize overall bandwidth.

Mixing Memory Brands

Although mixing memory brands can work in some cases, enterprise administrators generally prefer using identical modules across all slots. Matching the same capacity, speed, and timing ensures consistency and reduces the chance of incompatibility. Hynix modules are well-regarded for cross-brand compatibility, but matching specifications remains highly recommended.

Benefits of the Hynix DDR3 Registered ECC Memory

Organizations that rely on DDR3-based systems continue to choose this category because it offers a reliable, cost-effective way to maintain legacy infrastructure. Unlike consumer memory, enterprise-class Registered ECC RAM is engineered to withstand heavy workloads, continuous operation, and critical application environments.

Improved Data Integrity

ECC technology ensures that even minor bit errors are corrected before they cause system instability. This enhances data reliability and protects essential business information.

Optimized for Multi-Tasking Environments

High-density RDIMMs like the 16GB HMT42GR7BMR4C-G7 enable multitasking workloads that require significant memory resources. Virtual machines, concurrent applications, and complex processing tasks benefit greatly from increased memory capacity.