Product Overview
The Lenovo ThinkSystem 32GB TruDDR5 6400MHz (1Rx4) RDIMM (Part# 4X77A90964) is a high-performance, enterprise-grade server memory module engineered specifically for Lenovo ThinkSystem V4-generation servers. Operating at 6400MHz with a PC5-51200 bus speed, this single-rank DDR5 RDIMM delivers exceptional bandwidth and latency improvements over previous DDR4 generations. Built to Lenovo's TruDDR5 specification with ECC (Error Correcting Code) support, it ensures maximum data integrity and reliability for mission-critical workloads including virtualization, databases, AI inference, cloud-native applications, and high-density compute environments. The module runs at 1.1V for improved power efficiency and is validated through Lenovo's ServerProven compatibility program.
Technical Specifications
| Part Number | 4X77A90964 |
| Capacity | 32GB (1x 32GB) |
| Memory Type | DDR5 SDRAM (TruDDR5) |
| Speed | 6400MHz (PC5-51200) |
| Form Factor | 288-Pin RDIMM (Registered DIMM) |
| Rank | 1Rx4 (Single Rank x4) |
| ECC | Yes – Registered ECC |
| Voltage | 1.1V |
| Alternate Part Numbers | 03LC538, M321R4GA0PB2-CCP |
| Compatible Systems | Lenovo ThinkSystem SR630 V4, SR650 V4, ThinkStation P5 Gen 2, SR645 V3 (and other Lenovo ThinkSystem V4-generation platforms — verify via Lenovo ServerProven) |
| Condition | Refurbished / Pull — Tested & Verified |
Condition & Warranty
This module is offered in refurbished / system-pull condition. Each unit undergoes thorough functional testing to verify capacity, speed, ECC operation, and compatibility prior to shipment. Modules are inspected, cleaned, and shipped securely packaged. A 90-day replacement warranty is included. Bulk/volume pricing is available — please contact us for a quote. All sales to business buyers (B2B) welcome.