KSM64R52BD4-64MD Kingston 64GB DDR5 6400MHz Pc5-51200 ECC RDIMM Memory Module

Product Overview

The Kingston KSM64R52BD4-64MD delivers exceptional server-grade performance with advanced DDR5 technology, engineered for reliability and speed in enterprise environments.

General Information

• Brand: Kingston
• Part Number: KSM64R52BD4-64MD
• Product Type: 64GB DDR5 Memory Module

Technical Highlights

• Memory Architecture: DDR5
• Module Size: 64GB
• Speed Rating: 6400MHz transfer rate
• Interface: PC5-51200 bus type
• Form Factor: 288-pin DIMM

Performance Attributes

• Latency: CL46 for balanced efficiency
• Voltage Requirement: 1.1V optimized power usage
• Rank Configuration: Dual Rank X4 for enhanced bandwidth
• Error Handling: ECC Registered for superior data integrity

Reliability

• Built to support mission-critical applications, Kingston’s DDR5 module integrates advanced error correction and stability features.

Enterprise Benefits

• Improved multitasking with high-density memory capacity
• Consistent throughput for virtualization and database workloads
• ECC functionality reduces downtime risks
• Optimized voltage for energy-efficient operations

Key Takeaways

• 64GB DDR5 Registered ECC DIMM engineered for enterprise servers
• 6400MHz speed ensures rapid data access
• Dual Rank X4 design enhances bandwidth efficiency
• Reliable Kingston manufacturing for long-term stability

Kingston KSM64R52BD4-64MD 64GB Memory Kit

The KSM64R52BD4-64MD Kingston 64GB DDR5 6400MHz ECC Registered DIMM represents a high-performance enterprise-class memory module designed for next-generation data center and enterprise workloads. Featuring DDR5 technology, dual-rank x4 architecture, 6400MT/s transfer speeds, and advanced ECC functionality, this 288-pin module delivers unparalleled efficiency, reliability, and stability in mission-critical environments. Built with 16Gb Micron D die memory components, it is tailored for modern servers requiring superior bandwidth, lower power consumption, and enhanced error correction capabilities.

Core Specifications

At its core, the KSM64R52BD4-64MD is built upon the transformative DDR5 architecture, which introduces fundamental advancements over previous DDR4 generations. The module’s specifications define its performance tier and compatibility profile, making it crucial for system integrators and IT managers to understand each parameter in detail.

Capacity: 64GB (1x64GB) Dual Rank

This module provides a substantial 64 gigabytes (GB) of memory in a single, space-saving 288-pin DIMM form factor. The "1x64GB" designation indicates it is a single-module kit, ideal for populating systems in multiples to achieve desired total memory configurations (e.g., 256GB across four DIMM slots). The dual-rank design indicates the memory chips are organized into two independent sets (ranks) that the memory controller can address alternately. This architecture often provides better performance efficiency compared to single-rank modules at the same density by improving interleaving and reducing latency bottlenecks, leading to more effective utilization of the available memory bandwidth in server applications.

Understanding Dual-Rank vs. Single-Rank

In a dual-rank module, the memory controller can issue commands to one rank while another rank is preparing data, effectively hiding some latencies and improving overall throughput. For server workloads that involve large, contiguous data sets—common in SQL servers, data analytics, and virtualized environments—dual-rank modules like the KSM64R52BD4-64MD often deliver superior real-world performance compared to single-rank alternatives, despite sharing the same fundamental speed and latency ratings.

Speed & Bandwidth: DDR5-6400MHz & PC5-51200

The KSM64R52BD4-64MD 6400MHz speed rating (also expressed as 6400 MT/s) signifies the module's maximum data transfer rate per pin. This high data rate is a key benefit of DDR5 technology. The correlated PC5-51200 designation is a calculated peak bandwidth figure. It is derived by multiplying the data rate (6400 MT/s) by the module's data width (64 bits) and converting to bytes (divided by 8). This results in approximately 51,200 MB/s (or 51.2 GB/s) of theoretical peak bandwidth for a single module. When installed in multi-channel server platforms (typically 8-channel), aggregate system bandwidth scales dramatically, eliminating memory bottlenecks for CPU-intensive tasks.

The DDR5 Speed Advantage

DDR5's base speed starts where high-end DDR4 left off. The 6400MT/s speed of this Kingston module provides a significant boost in available memory bandwidth over mainstream DDR4-3200, directly translating to faster data processing, quicker application response times in multi-user environments, and improved performance for bandwidth-sensitive applications like scientific simulations and financial modeling.

Advanced Error Management & Signal Integrity

This memory category is defined by its enterprise-grade features that go beyond raw speed and capacity, focusing on data integrity and system stability above all else.

ECC Registered: Dual-Protection for Critical Data

The "ECC" (Error-Correcting Code) and "Registered" (sometimes called "Buffered") designations are the hallmarks of true server memory. ECC is a hardware-level feature that detects and corrects single-bit memory errors on-the-fly and detects multi-bit errors. This prevents silent data corruption, system crashes, and computational errors that can be catastrophic in financial, medical, or archival systems. The "Registered" component refers to an additional register (or buffer) on the DIMM that sits between the memory controller and the DRAM chips. This buffer handles electrical load, reducing strain on the system's memory controller and allowing for more stable operation with higher numbers of memory modules installed per channel—a necessity in large-capacity server configurations.

On-Die ECC (ODECC) & Sideband ECC

Beyond standard ECC, DDR5 architecture like that used in this Kingston module incorporates On-Die ECC. This is an additional, internal error-correcting mechanism that operates within the DRAM chip itself, correcting bit errors before data is sent to the system-level ECC. This two-tiered approach (On-Die + traditional ECC) significantly improves reliability and chip longevity, contributing to higher manufacturing yields and more robust modules capable of handling constant thermal cycling in server enclosures.

Power Efficiency

Operating at a nominal voltage of 1.1 volts, this DDR5 module is more power-efficient than its DDR4 predecessors (typically 1.2V). The reduced voltage directly lowers power consumption and heat output at the module level. When multiplied across dozens or hundreds of servers in a data center, this efficiency gain results in meaningful reductions in operational expenditure (OPEX) for cooling and electricity, while also supporting corporate sustainability goals. The power management integrated circuit (PMIC) on the DDR5 module itself, a key architectural shift from DDR4, allows for more granular and stable power delivery, further enhancing reliability.

Timing Parameters & Performance Latency

While speed (MHz) dictates how much data can move, timings (latencies) dictate how quickly the memory can respond to initial requests. The balance between the two defines real-world responsiveness.

CAS Latency & Timing: CL52

The KSM64R52BD4-64MD CL52 (CAS Latency 52) specification is a critical timing parameter. CAS Latency is the number of clock cycles between the memory controller issuing a read command and the moment the data is available on the module's output pins. In the context of a high-speed DDR5-6400 module, a CL52 rating represents an optimal balance engineered for server workloads. It is essential to understand that latency in nanoseconds (ns) is a more comparable metric across different speed grades. The absolute latency (in nanoseconds) for this module is calculated as (CL / Speed in MHz) * 2000. For CL52 at 6400MHz, this results in approximately 16.25 nanoseconds, which is competitive and optimized for the stability and capacity requirements of registered ECC memory.

Optimized for Server Workloads

Server memory is tuned for throughput and reliability over ultra-tight sub-timings often sought in gaming DRAM. The CL52 timing on this Kingston module ensures stable operation at the advertised 6400MT/s speed while maintaining the stringent signal integrity requirements necessary when multiple dual-rank, high-capacity modules are installed in a system. This stability is paramount for avoiding boot failures or runtime errors in production environments.

Physical Design

The physical construction of the module ensures proper fit, cooling, and electrical compatibility with target server platforms.

Form Factor: 288-Pin DIMM

The module utilizes the standard 288-pin DDR5 DIMM form factor. However, it is crucially important to note that DDR5 ECC Registered DIMMs (RDIMMs) are not physically or electrically compatible with DDR4 slots, nor are they compatible with motherboards designed for unbuffered (UDIMM) or non-ECC memory. The pin notches are in different locations. This module is exclusively designed for server and workstation motherboards that explicitly support DDR5 memory and feature a memory controller capable of utilizing ECC and Registered functionality. Always consult your system or motherboard manufacturer's qualified vendor list (QVL) to ensure compatibility.

Component Layout

Kingston Server Premier modules are built with a high-quality printed circuit board (PCB) and carefully selected DRAM components. The x4 organization noted in the part number refers to the data width of the individual DRAM chips used (4 bits). This x4 configuration is optimal for supporting the advanced Chip Select functionality in servers, which is required for large-capacity memory populations. While this module may not feature an oversized heatsink common in gaming modules, its design prioritizes compatibility with dense server airflow and the constrained space of blade server configurations. Its standard profile ensures it fits in virtually any 1U or larger server chassis without obstruction.

Target Applications & Use Cases

The specific combination of high capacity, ECC, Registered buffering, and DDR5 speed makes this memory module ideal for a discrete set of professional applications.

Enterprise Servers & Virtualization Hosts

In virtualization environments (VMware vSphere, Microsoft Hyper-V, Proxmox), physical memory is a primary resource limiting the number of virtual machines (VMs) a host can run. The 64GB density of this module allows IT administrators to build servers with massive memory pools (e.g., 512GB, 1TB) using fewer DIMM slots, leaving room for future expansion. The ECC protection is vital for protecting the state of dozens of VMs from memory errors.

In-Memory Databases & Analytics

Platforms like SAP HANA, Oracle Database In-Memory, and Microsoft SQL Server with In-Memory OLTP store critical, active datasets entirely in RAM to achieve extreme transaction speeds. For these systems, capacity, bandwidth, and unwavering data integrity provided by ECC RDIMMs are foundational requirements. The 6400MT/s bandwidth of this module accelerates query processing and real-time analytics.

High-Performance Computing (HPC)

Computational workloads in engineering simulation (FEA, CFD), genomic sequencing, and 3D rendering farms require sustained data throughput to feeding multiple CPU cores. The aggregated bandwidth of DDR5-6400 RDIMMs in multi-channel server platforms ensures that compute resources are not left waiting for data, maximizing ROI on expensive CPU licenses and reducing job completion times.

Cloud Infrastructure & Storage Controllers

Modern software-defined storage (SDS) and hyper-converged infrastructure (HCI) nodes use system memory for caching, deduplication, and metadata management. Large, reliable memory pools directly improve IOPS and reduce latency for connected users. The reliability features of this Kingston module minimize the risk of cache corruption that could affect entire storage volumes.