Brand: Lenovo | Category: Memory (RAM)
SKU: 4X77A87328 | Part #: 4X77A87328 | MPN: 4X77A87328
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The Lenovo TruDDR5 5600MHz ECC RDIMM 48GB (2Rx8), part number 4X77A87328, is a high-capacity registered DDR5 memory module engineered specifically for Lenovo ThinkSystem servers. Operating at 5600MHz with a dual-rank, single-load configuration across an x8 DRAM bus width, this module delivers substantial bandwidth improvements over prior DDR4 generations, supporting the high-throughput memory subsystem requirements of modern Intel Xeon Scalable (4th and 5th generation) platforms. The 48GB asymmetric density reflects DDR5's native support for non-power-of-two capacities, enabling more efficient memory population strategies across dual-socket and multi-socket server configurations.
Error-Correcting Code (ECC) functionality is integrated at both the DRAM and module level, with DDR5's on-die ECC providing a first layer of single-bit error correction before data reaches the memory controller, and the registered buffer managing command and address signals to ensure signal integrity across high-speed, high-density configurations. This layered reliability architecture makes the module well-suited to workloads where data integrity is non-negotiable, including in-memory databases, real-time analytics engines, and AI/ML training and inference pipelines that stage large datasets directly in system memory.
As a Lenovo TruDDR5 module, this RDIMM undergoes validation and qualification testing against Lenovo ThinkSystem server platforms, ensuring compatibility, stable operation under sustained load, and alignment with platform-specific power management and RAS (Reliability, Availability, and Serviceability) features. The module operates on the DDR5 standard 1.1V supply voltage, contributing to improved power efficiency per gigabyte compared to DDR4 predecessors, a consideration of increasing importance in high-density datacenter and hyperscale deployments across UAE, GCC, EMEA, and APAC regions.
| Manufacturer | Lenovo |
| Manufacturer Part Number | 4X77A87328 |
| Product Line | Lenovo TruDDR5 |
| Capacity | 48GB |
| Memory Type | DDR5 |
| Form Factor | RDIMM (Registered DIMM) |
| Speed | 5600MHz |
| Rank Configuration | 2Rx8 (Dual Rank, x8 bus width) |
| Error Correction | ECC (Error-Correcting Code) with DDR5 On-Die ECC (ODECC) |
| Operating Voltage | 1.1V |
| Pin Count | 288-pin |
| Module Width | 64-bit data bus with ECC |
| Buffer Type | Registered (with Register Clock Driver) |
| Compatible Platform | Lenovo ThinkSystem servers supporting DDR5 (Intel Xeon Scalable 4th/5th Gen) |
| On-Die ECC | Yes (native DDR5 ODECC per DRAM component) |
| RAS Features | ECC, Post Package Repair (PPR), patrol scrub support via platform |
| Label / Branding | Lenovo TruDDR5 (factory-validated for ThinkSystem platforms) |
Available from Omnixon Global. Submit an RFQ and our team will confirm configuration and availability for your order.
| Brand | Lenovo |
| Category | Memory (RAM) |
| SKU | 4X77A87328 |
| Part Number | 4X77A87328 |
| Condition | New |
| Manufacturer Part Number | 4X77A87328 |
| Product Line | Lenovo TruDDR5 |
| Capacity | 48GB |
| Memory Type | DDR5 |
| Form Factor | RDIMM (Registered DIMM) |
| Speed | 5600MHz |
| Rank Configuration | 2Rx8 (Dual Rank, x8 bus width) |
| Error Correction | ECC (Error-Correcting Code) with DDR5 On-Die ECC (ODECC) |
| Operating Voltage | 1.1V |
| Pin Count | 288-pin |
| Module Width | 64-bit data bus with ECC |
| Buffer Type | Registered (with Register Clock Driver) |
| Compatible Platform | Lenovo ThinkSystem servers supporting DDR5 (Intel Xeon Scalable 4th/5th Gen) |
| On-Die ECC | Yes (native DDR5 ODECC per DRAM component) |
| RAS Features | ECC, Post Package Repair (PPR), patrol scrub support via platform |
| Label / Branding | Lenovo TruDDR5 (factory-validated for ThinkSystem platforms) |
Part number 4X77A87328 is qualified for Lenovo servers that list compatible memory in their QVL. We verify QVL match before quoting — share your server model in the RFQ and our pre-sales engineers confirm fit, recommended population pattern, and total capacity supported.
Full manufacturer support (typically 3 years, RDIMM/LRDIMM SKUs often lifetime against manufacturing defects). All product is sourced through distribution so support registers cleanly under your company name.
Submit the RFQ form on this page with your quantity and destination country. Our pre-sales team responds with a vendor-confirmed quote, availability, and matching server-QVL confirmation if needed.