AB786564 Dell 16GB DDR4 3200MT/S PC4-25600 2RX8 ECC RDIMM Module Memory

Dell 16GB 3200MT/s Memory Overview

The Dell AB786564 16GB 3200MT/s PC4-25600 ECC Registered DDR4 SDRAM module belongs to the enterprise-grade PowerEdge server memory category, a segment engineered for sustained performance, reliability, and scalability in data center and professional server environments. Registered DIMM server memory plays a critical role in stabilizing electrical loads across the memory bus, allowing servers to support larger memory capacities without compromising signal quality. The 16GB capacity point represented by this module addresses a balanced performance-to-density ratio that is especially suitable for virtualization nodes, application servers, database instances, and infrastructure services where predictable latency and error correction are mandatory. As part of the DDR4 PowerEdge memory ecosystem, this category supports high data transfer rates, reduced operating voltage, and advanced error detection and correction mechanisms that protect data integrity at scale.

DDR4 RDIMM

DDR4 Registered DIMMs differ fundamentally from unbuffered memory by incorporating a register between the memory controller and the DRAM chips. In the Dell AB786564 module category, this register re-drives command and address signals, reducing electrical load on the memory controller and allowing more DIMMs to be populated per channel. This architectural advantage is essential for enterprise servers where maximizing memory capacity without sacrificing stability is a core requirement. The dual rank configuration of this module category provides improved memory interleaving and throughput compared to single rank alternatives, particularly in multi-channel memory architectures common in Dell PowerEdge servers. Each rank acts as an independent memory array, enabling the memory controller to optimize access patterns and reduce idle cycles. The x8 DRAM organization further enhances fault tolerance, as it enables advanced ECC capabilities that go beyond simple single-bit error correction.

PC4-25600

Operating at 3200MT/s, this category of DDR4 RDIMM delivers a theoretical peak bandwidth of 25.6GB/s per module, aligning with PC4-25600 specifications. This high transfer rate supports data-intensive workloads such as in-memory databases, analytics platforms, and high-concurrency virtualization environments. The increased bandwidth helps reduce memory bottlenecks that can otherwise limit CPU utilization, especially in modern multi-core processors deployed in PowerEdge servers. The 3200MT/s speed grade also reflects advancements in DDR4 signaling and timing optimization. Compared to earlier DDR4 generations, this category achieves higher throughput while maintaining stability through improved PCB layouts, refined DRAM silicon, and optimized register design. These improvements are critical in environments where servers operate continuously under heavy load, as they ensure consistent performance over extended operational lifecycles.

CL22 Latency

CAS latency 22 represents a carefully balanced timing profile optimized for stability at high data rates. In server environments, absolute latency is only one component of overall performance, with throughput, concurrency, and reliability playing equally important roles. The CL22 timing of this module category ensures compatibility with PowerEdge memory controllers while maintaining predictable response times across diverse workloads. For applications such as virtualization hosts or application servers, the combination of high bandwidth and stable latency characteristics enables efficient context switching and memory access patterns. This balance is particularly important in multi-tenant environments where memory contention can otherwise introduce unpredictable performance degradation.

Error Correcting Code

ECC Registered memory is a foundational requirement in enterprise server platforms, and this category exemplifies Dell’s commitment to data integrity. The ECC functionality embedded within the Dell AB786564 module category continuously monitors data transactions, detecting and correcting single-bit errors while identifying multi-bit faults that could indicate underlying hardware issues. This capability is essential for protecting mission-critical data and maintaining system uptime. The x8 DRAM configuration enhances ECC effectiveness by enabling advanced error correction schemes that are not possible with x4 or non-ECC memory. In practical terms, this means improved resilience against transient errors caused by electrical noise, cosmic radiation, or component aging. For organizations running databases, financial systems, or healthcare applications, this level of protection is not optional but mandatory.

Reliability

Server memory modules in this category are designed for 24/7 operation under sustained thermal and electrical stress. The 1.2V operating voltage of DDR4 technology reduces power consumption and heat generation compared to earlier DDR3 modules, contributing to improved system efficiency and longer component lifespan. Dell’s validation process ensures that each module can operate reliably within the thermal envelopes defined for PowerEdge servers. Long-term reliability is further enhanced by rigorous testing for signal integrity, timing margins, and compatibility across supported server platforms. This reduces the risk of intermittent faults that can be difficult to diagnose and costly to resolve in production environments.

Compatibility

This category of memory modules is specifically engineered for Dell PowerEdge servers, ensuring seamless integration with supported models and BIOS configurations. Compatibility extends beyond physical fit to include firmware-level optimizations that allow the memory controller to recognize and configure the module correctly at its rated speed and timings. This eliminates the guesswork often associated with third-party memory upgrades. PowerEdge servers are designed with scalable memory architectures, and this RDIMM category supports flexible deployment strategies. Administrators can populate memory channels incrementally, balancing capacity and performance according to workload requirements. The 16GB capacity point allows for granular scaling, enabling precise memory provisioning without overcommitting budget or resources.

Use Cases

This category of Dell PowerEdge server memory is suited to a wide range of enterprise workloads. Virtualization platforms benefit from the balanced capacity and bandwidth, enabling efficient allocation of memory resources to virtual machines. Application servers gain predictable performance under concurrent access, while database systems benefit from ECC protection and stable throughput.

Scalability

As organizations adopt private and hybrid cloud architectures, memory scalability becomes a key consideration. This DDR4 RDIMM category supports incremental upgrades, allowing administrators to expand memory capacity as demand grows. The registered architecture ensures that scaling does not compromise signal integrity, even as more modules are added per channel.

Power Efficiency

Operating at 1.2V, this category of DDR4 server memory contributes to reduced power consumption compared to earlier memory generations. Lower voltage translates to lower heat output, which in turn reduces cooling requirements and overall energy costs. In large-scale deployments, these savings can be significant over the lifespan of the server infrastructure. Power efficiency also supports sustainability initiatives by reducing the environmental impact of data center operations. When combined with Dell PowerEdge servers’ energy-efficient designs, this memory category helps organizations achieve performance goals while managing operational expenses.