What are the key specifications of the Lenovo 4X77B07421 memory module?

The 4X77B07421 is a ThinkSystem 128GB TruDDR5 6400MHz (2Rx4) RDIMM-A v2 with PC5-51200 bus, 288 pins, Registered ECC, and 32Gb DRAM. It operates at 6400MHz max speed in 1DPC configurations for servers like SR675 V3, providing high bandwidth for virtualization and AI.

Which servers are compatible with 4X77B07421 DDR5 memory?

Compatible with Lenovo ThinkSystem servers supporting up to 24 DDR5 DIMMs at 6400MHz, such as SR675 V3 with 5th Gen processors (12 DIMMs per CPU, 1DPC). Supports up to 3TB total with 24x 128GB modules; check Lenovo memory summary for full matrix.

How does TruDDR5 technology benefit server performance?

TruDDR5 in 4X77B07421 offers higher bandwidth than DDR4, lower voltage for efficiency, and on-die ECC for reliability. 6400MHz speed with 2Rx4 rank handles in-memory databases, more VMs, and HPC without bottlenecks, reducing latency versus storage access.

Is the 4X77B07421 suitable for AI and virtualization workloads?

Yes, 128GB capacity and 6400MHz speed excel in AI training by feeding GPUs fast data, and virtualization by hosting dense VMs. ECC protects mission-critical data; power-efficient DDR5 lowers datacenter OPEX in high-utilization environments.

What is the rank and organization of this memory module?

2Rx4 dual-rank x4 organization with 32Gb DRAM per die. This configuration balances density and performance for 6400MHz operation in supported ThinkSystem servers, verified in Lenovo lp1021 memory summary.

Does 4X77B07421 support error correction for enterprise use?

Yes, features Registered ECC (RDIMM) with on-die ECC for DDR5, ensuring data integrity under heavy loads. Ideal for financial, healthcare, and cloud apps where corruption risks downtime; Lenovo rates it for mission-critical stability.

4X77B07421 - Lenovo 4X77B07421 128GB 6400MHz 2Rx4 TruDDR5 RDIMM

Name: Lenovo 4X77B07421 128GB 6400MHz 2Rx4 TruDDR5 RDIMM
Brand: Lenovo
SKU: 4X77B07421
Price: 7810 USD
Availability: InStock

4X77B07421 - Lenovo 4X77B07421 128GB 6400MHz 2Rx4 TruDDR5 RDIMM | US IT Hardware

Product overview

The Lenovo 4X77B07421 ThinkSystem 128GB TruDDR5 6400MHz (2Rx4) RDIMM-A v2 memory module is engineered for enterprise datacenter servers requiring maximum memory density and bandwidth. Featuring DDR5 technology with PC5-51200 bus type, 6400MHz data transfer rate, 288-pin configuration, and Registered ECC for data integrity, it supports up to 3TB per node in systems like SR675 V3. Dual-rank 2Rx4 organization with 32Gb DRAM enables handling of demanding workloads including in-memory databases like SAP HANA, dense virtualization with more VMs per server, AI/ML training, HPC simulations, and real-time analytics. Compared to DDR4, DDR5 provides higher bandwidth, lower voltage for power efficiency, and improved reliability under sustained loads. Ideal for 5th Gen Intel/AMD processors with 24 DIMM slots at 1DPC, this Samsung OEM module ensures stable performance, reduced latency by minimizing storage access, and future-proof scalability for cloud-native and analytics environments.

128GB capacity supports up to 3TB per 24-DIMM server node.
6400MHz speed with PC5-51200 bus delivers high memory bandwidth.
2Rx4 RDIMM with Registered ECC ensures data integrity.
288-pin design fits standard ThinkSystem server slots.
32Gb DRAM technology enables dense enterprise workloads.
TruDDR5 v2 optimized for 5th Gen Intel/AMD processors.

Expedited and overnight shipping options are available at checkout, priced by destination and service.
Purchase orders accepted from qualified institutions.
Refunds within 14 days and replacements within 30 days of delivery with an RMA (25% restocking fee on customer-initiated returns), and every part carries our Standard 30-Day Warranty - see our return policy or contact US IT Hardware.

Featuring

Manufacturer part #	4X77B07421
Brand	Lenovo
Condition	Refurbished
OEM	Samsung
Pins	288
Rank	2Rx4 (Dual Rank)
Model	128GB TruDDR5 6400MHz (2Rx4) RDIMM-A v2
Bus Type	PC5-51200
Capacity	128GB
Form Factor	RDIMM
Memory Speed	6400MHz
Product Line	ThinkSystem

Compatible systems

Optimized for Lenovo ThinkSystem servers with DDR5 support up to 6400MHz; verify specific models via lp1021 matrix.

Lenovo ThinkSystem
Model: SR675 V3
Form factor: 24x DIMM 1DPC
Generation: 5th Gen AMD/Intel
Up to 3TB with 24x 128GB; 6400MHz supported.

Best for

Virtualization
Hosts more VMs per physical server without performance degradation in dense VDI environments.
AI and HPC
Feeds data-hungry GPUs/CPUs at high speeds for model training and complex simulations.
In-Memory Databases
Enables SAP HANA-style databases to operate fully in memory for ultra-fast transactions.
Real-Time Analytics
Processes large datasets with low latency in analytics and big data platforms.
Cloud-Native Apps
Supports scalable microservices and containerized workloads in private clouds.
High-Density Servers
Maximizes capacity in 24-DIMM slots for 5th Gen processor-based systems.

Lenovo 4X77B07421 128GB 6400MHz 2Rx4 TruDDR5 RDIMM

Product overview

Featuring

Compatible systems

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Lenovo 4X77B07421 128GB 6400MHz 2Rx4 TruDDR5 RDIMM

Product overview

Featuring

Compatible systems

Best for

Details

Shipping, warranty & returns

Customer reviews

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Frequently asked questions