Micron MTC40F204WS1RC64BB1R 96GB Pc5-51200 ECC Registered Memory.

Micron MTC40F204WS1RC64BB1R at a glance

The Micron MTC40F204WS1RC64BB1R is a 96GB DDR5 registered DIMM engineered for modern servers and high-performance workstations. Built to the PC5-51200 specification (DDR5-6400 / 6400 MT/s), this module combines high bandwidth with ECC register-based reliability and a dual-rank architecture to meet the demanding throughput and fault-tolerance needs of data centers, virtualization hosts, HPC nodes and database servers. :contentReference[oaicite:0]{index=0}

Key technical highlights

• Capacity: 96 GB single-module capacity suitable for dense memory configurations.
• Speed: DDR5-6400 / PC5-51200 (6400 MT/s) for sustained high throughput.
• Form factor: 288-pin RDIMM (registered DIMM) for server/mainboard compatibility.
• ECC & Registered: Error-Correcting Code with register buffer (RDIMM) improves system stability under heavy loads.
• Ranks & organization: Dual-rank organization (commonly listed as 2Rx4 or 2Rx8 depending on die width) to balance density and performance.
• Operating voltage: Standard DDR5 module voltage (~1.1 V operation), optimized for energy efficiency versus DDR4.

Detailed specifications and architecture

Memory density, die count and internal banks

Micron’s 96GB RDIMM is assembled from high-density DRAM components arranged to create a dual-rank module. Internally the device supports multiple bank groups and 32 internal banks, a DDR5 architectural facet that improves parallelism of memory operations and helps sustain multi-threaded workloads. These internal architectural decisions let the module service more concurrent memory transactions and reduce contention at high transfer rates.

Rank and channel behavior

Dual-rank modules behave differently from single-rank modules in controller interleaving and loading. In many server platforms, dual-rank RDIMMs can provide better effective throughput by enabling the memory controller to interleave transactions across ranks, especially when paired with multi-channel CPU memory architectures. However, adding ranks can also increase the electrical load on the memory controller, which is one reason registered buffering (the RDIMM register chip) is used to isolate and stabilize signals. 

ECC and registered buffering

This Micron module implements ECC (Error-Correcting Code) at the module level to detect and correct single-bit errors, and detect multi-bit errors. ECC combined with RDIMM registered buffering increases system reliability and is a de-facto requirement for enterprise server use—particularly in virtualization, in-memory databases, financial compute, and scientific workloads where silent data corruption cannot be tolerated. The register chip on RDIMMs reduces timing uncertainty and allows reliable operation at higher speeds and with multiple DIMMs per channel.

Performance characteristics and real-world throughput

Bandwidth and latency tradeoffs

At DDR5-6400 (PC5-51200), raw theoretical peak bandwidth per module is much higher than DDR4 counterparts; this translates to faster memory-bound application performance. In practice, observed performance depends on CPU memory controller support, DIMM population (number of modules per channel), ranks, and platform memory training. Modules like MTC40F204WS1RC64BB1R are optimized to hit JEDEC-defined timings and voltage windows for stable operation at the rated frequency, while offering the headroom required for consistent throughput across multi-tenant and multi-process environments.

When bandwidth matters

Workloads that benefit most include large in-memory databases, real-time analytics, scientific simulation, AI/ML training (memory staging and preprocessing), and high-frequency caching. In such scenarios the high sustained transfer rate of DDR5-6400 reduces read/write stalls and improves overall application responsiveness under heavy concurrent load.

Power efficiency

DDR5 lowers operating voltage relative to common DDR4 voltages (DDR5 modules typically operate around 1.1V vs DDR4's 1.2V nominal), which reduces power per bit transferred. For large memory pools (multiple terabytes across many DIMMs), this adds up to meaningful energy savings and lowers thermal design requirements for dense servers.

Compatibility and platform considerations

Server and motherboard support

RDIMMs must be supported by the server or motherboard firmware and memory controller. Micron’s 96GB DDR5 RDIMMs are targeted for modern Intel® Xeon and AMD EPYC server platforms that support DDR5 RDIMM modules at PC5-51200 speeds. Compatibility lists and vendor qualification notes should be checked for exact board and CPU combinations before purchase. Many vendors publish validated memory compatibility guides; system integrators and OEMs often reference Micron’s module part-detail and datasheet information during qualification.

Population rules and best practices

• Always consult your server/motherboard vendor’s DIMM population rules — mixing RDIMMs and UDIMMs, or using unsupported rank counts, may prevent the system from booting.
• Populate channels symmetrically to maximize memory bandwidth and latency sensitivity.
• Refer to the platform’s firmware (BIOS/UEFI) updates — vendors frequently add improved memory training and DDR5 speed support in later revisions.

Firmware, SPD and XMP-like profiles

DDR5 modules include SPD (Serial Presence Detect) metadata that the platform reads during initialization; this module’s SPD contains JEDEC profiles for guaranteed stable operation and may include vendor timing tables for different supported speeds. Unlike consumer DDR5 UDIMMs that sometimes ship with aggressive XMP profiles, server RDIMMs typically adhere to JEDEC and vendor-validated timing sets to prioritize stability. Always verify SPD readings in your system management tools after installation. 

Use cases

Enterprise servers & virtualization

System builders deploying virtualization hosts (VMware, Hyper-V, KVM) or high-density container platforms will find 96GB RDIMMs valuable for consolidating many VMs per socket without sacrificing reliability. ECC and registered buffering are essential for multi-tenant production workloads where uptime and data integrity are owned by the host operator.

Memory-heavy databases and analytics

In-memory databases and analytics engines (e.g., Redis, Memcached, OLAP databases, columnar engines) often rely on large memory footprints to avoid expensive disk I/O. High bandwidth and low idle power offered by DDR5-6400 RDIMMs allow these services to scale efficiently while maintaining quick access to working data sets.

High-performance compute and specialized workloads

HPC simulations, weather modeling, genomics pipelines and AI dataset staging benefit from the combination of capacity and throughput. The dual-rank organization can provide better performance for random access patterns and large matrix operations when the memory controller and platform are tuned for multiple ranks.

Thermal, physical and reliability considerations

Module height, thermal profile and airflow

Many enterprise RDIMMs are available in low-profile variants to accommodate dense chassis and blade enclosures. Even when the module is low profile, ensuring proper airflow and server cooling remains crucial — high sustained throughput can elevate module temperatures. Confirm the module’s mechanical height with your chassis vendor, and follow recommended rack airflow practices. 

Long-term reliability

Micron tests modules for component and module-level reliability; enterprise RDIMMs often carry manufacturer warranties and are subject to component screening suited for server lifecycle expectations. Choosing genuine, vendor-sourced modules and purchasing from authorized distributors helps ensure RMA support and compatibility.