Micron 64GB DDR5 RDIMM 2Rx8 6400MT/s PC5-51200 CL52 ECC 1.1V MTC40F20465S1RC64BH1

Brand: Micron | Category: Memory (RAM)

SKU: MTC40F20465S1RC64BH1 | Part #: MTC40F20465S1RC64BH1 | MPN: MTC40F20465S1RC64BH1

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Product Overview

The Micron MTC40F20465S1RC64BH1 is a 64GB DDR5 Registered DIMM (RDIMM) operating at 6400MT/s (PC5-51200), purpose-built for enterprise servers and high-performance computing environments. Featuring a 2Rx8 dual-rank configuration, CL52 latency, and 1.1V operating voltage with 12V external power support, this module delivers the memory bandwidth and capacity density that modern AI, cloud, and virtualisation workloads demand. With on-die ECC (ODECC) and traditional ECC error correction, it ensures data integrity in continuous mission-critical deployments.

Key Features & Benefits

• Ultra-High Bandwidth at 6400MT/s: PC5-51200 data rate provides up to 51.2 GB/s peak theoretical bandwidth per module, accelerating memory-intensive applications including in-memory databases and large language model (LLM) inference.
• 64GB High-Capacity Density: Single-module 64GB capacity enables server configurations exceeding 1TB per platform when fully populated, reducing slot usage and improving per-server memory economics.
• 2Rx8 Dual-Rank Architecture: Dual-rank organisation maximises memory controller utilisation, improving effective bandwidth and interleaving efficiency compared to single-rank equivalents.
• ECC + On-Die ECC Protection: Hardware-level error correction detects and corrects single-bit errors while flagging multi-bit faults, critical for financial, healthcare, and government data workloads where data integrity is non-negotiable.
• 1.1V Low-Voltage Operation: Approximately 20% lower power consumption versus DDR4 at comparable speeds, translating into meaningful TCO reductions across large-scale data centre deployments.

Technical Architecture

Built on Micron's 16Gb DDR5 DRAM die (Y62E-16Gb), this RDIMM uses a registered buffer (RCD) to extend signal integrity across higher-speed interfaces, enabling stable operation at 6400MT/s on platforms such as Intel Xeon Scalable (Sapphire Rapids, Emerald Rapids) and AMD EPYC (Genoa, Bergamo). The 288-pin DDR5 DIMM form factor is backward-incompatible with DDR4 slots, requiring DDR5-native server motherboards. The module supports JEDEC DDR5 standard compliance and integrates a SPD (Serial Presence Detect) hub for automated platform configuration.

Performance & Capacity

At 6400MT/s with a 64-bit wide bus (plus ECC bits), each module delivers approximately 51.2 GB/s peak bandwidth. CL52 latency is optimised for throughput-centric workloads where bandwidth outweighs raw latency, making this module ideal for streaming analytics, HPC simulations, and transformer-based AI model execution. Dual-rank interleaving further increases effective throughput when paired with capable memory controllers on modern server platforms.

Compatibility & Integration

The MTC40F20465S1RC64BH1 is compatible with DDR5 RDIMM slots on leading server platforms including Dell PowerEdge (R760, R860, R960), HPE ProLiant (DL380 Gen11, DL560 Gen11), Lenovo ThinkSystem (SR650 V3, SR860 V3), Supermicro X13 series, and Inspur NF series servers. It operates within standard JEDEC DDR5 RDIMM specifications and is validated for use with Intel Xeon Scalable 4th/5th Gen and AMD EPYC 9004 series processors. Mixed-capacity configurations should be validated against OEM QVL (Qualified Vendor Lists).

Ideal Use Cases

• AI & Machine Learning Inference: High-bandwidth memory feeds GPU and CPU inference engines with large model weights and batch data, reducing memory bottlenecks in transformer and deep learning pipelines.
• Cloud & Hyperscale Virtualisation: High-density 64GB modules allow hypervisors (VMware vSphere, Nutanix AHV, KVM) to host more VMs per node, improving consolidation ratios and reducing infrastructure footprint.
• In-Memory Databases & Analytics: Platforms such as SAP HANA, Redis, and Apache Spark benefit directly from increased memory capacity and bandwidth for real-time analytics on large datasets.
• High-Performance Computing (HPC): Scientific simulation, computational fluid dynamics, and financial modelling workloads leverage the sustained bandwidth of DDR5-6400 to accelerate time-to-result.