HMA42GR7BJR4N-VK Hynix 16GB DDR4 2666mhz PC4-21300 RDIMM Memory Module

Hynix Server Memory Overview

The Hynix HMA42GR7BJR4N-VK represents a premium-grade server memory solution engineered for demanding enterprise environments. This 16GB DDR4 RDIMM module combines advanced error correction capabilities with robust performance characteristics, making it an ideal choice for data centers, cloud infrastructure, and mission-critical server applications where reliability and data integrity are paramount.

Capacity: 16GB

DDR4 Server Memory Technology

DDR4 memory represents a significant technological leap from its DDR3 predecessor, offering improved performance, enhanced power efficiency, and greater reliability. The Hynix HMA42GR7BJR4N-VK leverages these advancements with a reduced operating voltage of 1.2V compared to DDR3's 1.5V, resulting in up to 20% lower power consumption while delivering higher data transfer rates. The architectural improvements include bank groups that allow for more efficient memory access patterns and higher burst lengths for improved data throughput.

Faster Data Transfer

2666MT/s Data Rate Explained

The 2666MT/s (Mega Transfers per second) specification indicates the module's capability to perform 2.666 billion data transfers per second. With DDR (Double Data Rate) technology, data is transferred on both the rising and falling edges of the clock cycle, effectively doubling the data rate compared to the actual clock frequency. This translates to a peak theoretical bandwidth of 21.3GB/s (calculated as 2666MT/s × 8 bytes/transfer), which is reflected in the PC4-21300 designation (21300MB/s).

Registered DIMMs Enhancing Signal Integrity

The Hynix HMA42GR7BJR4N-VK utilizes Registered DIMM (RDIMM) technology, which incorporates a register (or buffer) between the memory controller and the DRAM chips. This register buffers command, address, and control signals, reducing the electrical load on the memory controller and enabling support for higher memory capacities per channel. While adding a minimal latency penalty (typically one clock cycle), this architecture significantly improves signal integrity and system stability, especially in configurations with multiple modules per channel or high-density memory installations.

Capacities

The buffering capability of RDIMMs allows servers to support significantly more memory modules per channel compared to unbuffered designs, enabling terabyte-scale memory configurations essential for memory-intensive applications like in-memory databases, large virtualization deployments, and big data analytics platforms.

Reliability

In x4 configured memory, if an entire DRAM chip fails, it affects only 4 bits of the 72-bit wide memory bus (64 data bits + 8 ECC bits). Advanced memory controllers can typically recover from such failures using the remaining functional chips and ECC information. This capability provides an additional layer of fault tolerance beyond standard single-bit error correction, further enhancing system reliability for mission-critical applications.

Enterprise Server Deployments

The Hynix HMA42GR7BJR4N-VK is ideally suited for a wide range of enterprise server applications where reliability, performance, and data integrity are critical requirements. Common deployment scenarios include:

Scalability

When planning server memory upgrades, the Hynix HMA42GR7BJR4N-VK provides an excellent balance of current performance requirements and future scalability. The 16GB capacity per module allows for substantial total memory configurations in modern server platforms, while the 2666MT/s speed ensures compatibility with current and next-generation server processors that support this memory standard.

Compatibility

The Hynix HMA42GR7BJR4N-VK is designed for compatibility with a wide range of enterprise server platforms that support DDR4 2666MT/s registered ECC memory. This includes systems based on Intel Xeon Scalable Processors (Purley platform and later), AMD EPYC processors, and compatible workstation platforms requiring ECC RDIMM memory. Always consult your system manufacturer's compatibility guide to ensure proper operation and optimal performance.