7X77A01305 Lenovo 64GB PC4-21300 DDR4-2666MHZ ECC Registered LRDIMM

Compatibility and Integration

Built specifically for Lenovo enterprise servers, this module ensures seamless integration and compatibility across a wide range of ThinkSystem platforms. Its registered architecture allows for stable performance even in configurations with multiple memory modules per channel.

Performance Optimization and Efficiency

High-Speed Data Transfer

Delivering an effective speed of 2666 megatransfers per second, this Lenovo DDR4 memory ensures that large volumes of data can be processed rapidly. This translates into improved performance for database operations, virtual machines, and multitasking workloads.

Scalable and Reliable Memory

With ECC Registered architecture and load reduction, the 7X77A01305 module provides the foundation for large-scale computing environments. The reliability of ECC ensures that mission-critical applications maintain uptime and data accuracy.

Longevity and Endurance

Tested under extensive workloads, this Lenovo 64GB DDR4 module maintains performance consistency over time. Its ECC and registered technologies prevent data errors, ensuring stability during prolonged server operation.

System Compatibility

This memory module is specifically designed to integrate flawlessly with Lenovo enterprise server systems. It supports multi-channel architectures for balanced performance across all DIMM slots.

Advanced Features and Benefits

Exceptional Data Integrity

The ECC Registered memory design ensures advanced error detection and correction, protecting mission-critical data from corruption. This technology minimizes system crashes and enhances long-term operational reliability for intensive workloads.

Optimized for Server Efficiency

Lenovo’s DDR4-2666MHz module is optimized for high-throughput environments. The 2666MHz data rate boosts bandwidth and enhances overall system responsiveness, supporting efficient data handling for virtualization, analytics, and enterprise applications.

Capacity and Form Factor

The module has a capacity of 64 GB and comes as one 64 GB module (1×64 GB). This capacity supports high‑end server applications, virtualization hosts, large in‑memory databases, analytics workloads, and other memory‑intensive tasks. The form factor is 288‑pin DDR4, compatible with typical server DIMM slots for DDR4 LRDIMM modules.

Memory Speed (DDR4‑2666 / PC4‑21300)

This module runs at DDR4‑2666 MHz (sometimes noted as PC4‑21300). This means it moves data at 2 666  megatransfers per second per memory clock cycle, translating to a theoretical bandwidth around 21.3 GB/s per module (in ideal conditions). This speed is widely supported by many enterprise platforms and offers a strong performance baseline. 

Rank and Configuration (4Rx4, Dual vs Quad Rank)

The module is labelled as 4Rx4 (four ranks, each x4 bits wide) meaning it’s a quad‑rank module. Despite the user prompt stating “Dual Rank”, many spec sheets point to 4Rx4 (quad rank) for this part number. Quad‑rank modules generally allow higher density per module compared to single or dual rank, enabling 64 GB in a single module. However, they may impose higher demands on the memory controller or channel, so system compatibility must be verified.

Virtualization, Databases, In‑Memory Workloads

With a high capacity of 64 GB per module, these modules are ideal for virtualization hosts where multiple virtual machines consume large portions of memory, for in‑memory databases (e.g., SAP HANA, Oracle), big data processing, analytics, HTAP (Hybrid Transaction/Analytical Processing) workloads, caching layers, or large scale memory caching systems. Because memory is one of the key bottlenecks in such systems, investing in enterprise‑grade DIMMs like this one ensures performance and reliability.

Memory Scaling and Capacity Expansion 

One of the advantages of using high‑capacity modules is the ability to expand memory with fewer DIMMs per channel or per socket. For instance, using 64 GB modules means you can populate each channel with fewer modules to reach large totals (e.g., 512 GB or 1 TB per socket) rather than filling with many 16 GB modules. This also simplifies slot management, potentially reduces power and thermal overhead, and offers more flexibility for future upgrades.

LRDIMM vs RDIMM vs UDIMM

In enterprise systems, RDIMM (Registered DIMM) and LRDIMM (Load‑Reduced DIMM) differ in how they manage electrical load and buffering. LRDIMMs insert a buffer to reduce the load on the memory controller, enabling higher densities and greater scalability in multi‑socket or high‑channel systems. UDIMM is for consumer/non‑registered use and lacks ECC or buffering. Choosing an LRDIMM (like the one in this module) is wise when you are looking for maximum memory capacity, reliable bus operation, and best match for server platforms.

Reliability and Data Integrity

ECC and registered design make this category suitable for enterprise workloads where data integrity, uptime, and error correction are mandatory. The inclusion of ECC makes the memory capable of correcting single‑bit errors and detecting double‑bit errors.