4X77A93887 Lenovo 5600Mhz Pc5-51200 128GB DDR5 SDRAM 288-pin Rdimm RAM Module For Server

Overview of the Lenovo 128GB DDR5 RDIMM Memory 

A high-capacity, server-grade memory module engineered for demanding enterprise workloads. The LENOVO 4X77A93887 is a single 128GB DDR5 RDIMM built to provide dependable, high-throughput memory for systems that require ECC protection and registered signaling. Optimized for modern platforms, this module balances speed, stability, and power efficiency.

Main Information

• Manufacturer: Lenovo
• Part Number: 4X77A93887
• Product Type: 128 GB DDR5 SDRAM RDIMM Memory Module

Key Specifications at a Glance

• Capacity: 128GB (single-module)
• Memory Type: DDR5 SDRAM (PC5 class)
• Throughput / Frequency: 5600 MHz
• CAS Latency: CL46
• Organization: x4 chip layout
• Rank: Dual-rank configuration
• Signal Type: Registered (RDIMM) with ECC functionality
• Form Factor / Pins: 288-pin DIMM
• Operating Voltage: 1.1 V

This RDIMM is intended for data centers, virtualization hosts, database servers, and compute clusters where memory capacity and error correction directly affect uptime and performance. Its DDR5 architecture yields higher bandwidth and improved power characteristics compared to legacy DDR4 modules.

Performance 

• High bandwidth: 5600MHz operation supports heavy parallel workloads and reduces memory bottlenecks for multi-threaded applications.
• Lower latency value for DDR5: CL46 tuned for a balance of responsiveness and throughput in server environments.
• Dual-rank advantage: Dual-rank modules can deliver better memory interleaving and effective throughput on compatible platforms versus single-rank alternatives.
• Registered signaling + ECC: Registered buffers and error-correcting code minimize data corruption and improve system reliability under sustained load.

Compatibility

This memory is system-specific and designed primarily for servers validated by Lenovo. Before purchasing or installing, verify platform support and firmware compatibility. While the module conforms to PC5 (DDR5) standards, firmware/BIOS revisions and server memory population rules can affect detection and optimal operation.

Compatibility Checklist

• Confirm server model supports 288-pin DDR5 RDIMMs.
• Match memory population rules (channel/rank balancing) per server manual.
• Verify BIOS/firmware is updated to the version that enables DDR5 5600MHz modes.
• When mixing modules, ensure identical speed, voltage, and rank characteristics for best stability.

Lenovo 4X77A93887 128GB DDR5 PC5-51200 RDIMM 

The Lenovo 4X77A93887 128GB DDR5 5600MHz PC5-51200 2Rx4 ECC Registered 1.1V CL52 DDR5 SDRAM 288-pin RDIMM memory module represents a high-capacity, server-grade DRAM option designed for enterprise servers, data centers, virtualization hosts and memory-dense workloads. This category covers Lenovo-branded and Lenovo-qualified registered DDR5 server memory modules with 128GB capacity, ECC (Error-Correcting Code) support, RDIMM (Registered DIMM) buffering, dual-rank x4 organization (2Rx4), low-voltage 1.1V operation and JEDEC PC5-51200 timing at an effective 5600MT/s (commonly referred to as 5600MHz). Use this category to compare modules by latency (CL52), rank and organization (2Rx4), compatibility matrices for specific Lenovo server models, and to select the right module for scaling memory capacity across dual-socket and multi-socket Intel and AMD server platforms that support DDR5 registered memory.

Form Factor & Electrical Characteristics

Mechanically, the module is the industry-standard 288-pin DIMM for DDR5 server sockets. It operates at a low 1.1V supply, contributing to energy savings across dense server racks while maintaining signal integrity through registered buffering.

Chip Layout and Signal Organization

The x4 chip organization provides a specific arrangement of memory chips on the module that aligns with enterprise memory controller expectations. Coupled with dual-rank placement, this design helps with sustained throughput and reliability under sustained multi-threaded access patterns.

Memory Population Strategies

For systems with multiple memory channels, populate modules in matched sets according to the server vendor’s guidelines. Using identical capacity and speed across channels yields the best memory interleaving and performance. When scaling capacity, prefer adding matched RDIMMs rather than mixing RDIMM with UDIMM or other module types.

Reliability, Error Correction & Enterprise Features

The module includes ECC (Error-Correcting Code) capabilities which, together with registered buffering, deliver the level of data protection expected in enterprise-class servers. These features reduce the risk of silent data corruption and add a layer of fault tolerance crucial for mission-critical operations.

When buying, reference the Lenovo part number 4X77A93887 to ensure you obtain the correct factory-configured module. Many resellers list compatible or equivalent SKUs—exercise caution and confirm specifications (capacity, speed, RDIMM/ECC, voltage, and rank) before finalizing a purchase.

Comparisons & Alternatives

For people evaluating memory options, compare this 128GB DDR5 RDIMM with alternatives that differ by rank (single vs. dual), form factor (RDIMM vs. LRDIMM), and speed (e.g., 5200 vs. 5600 MHz). Consider LRDIMMs if the target system requires very high per-module capacities, but note LRDIMMs use different buffering and may interact differently with certain server platforms.