What are the key specifications of the Lenovo 4X77A93528 memory module?

The 4X77A93528 is a Lenovo ThinkSystem 64GB TruDDR5 6400MHz (2Rx4) RDIMM-A using 16Gb DRAM. It operates at 6400MT/s (PC5-51200R), 1.1V, 288-pin ECC registered design for servers like SR635 V3 with 12 DDR5 channels, 1 DIMM per channel, enabling up to 3TB total memory.

Which servers support the 4X77A93528 RDIMM?

Compatible with Lenovo ThinkSystem SR635 V3, SR675 V3 supporting 5th Gen AMD EPYC processors. Features 12 DIMM slots (1DPC), DDR5 up to 6400MHz, RDIMMs, 3DS RDIMMs. Rated for 6400MHz only with select CPUs; check Lenovo ServerProven for full list.

What performance benefits does TruDDR5 6400MHz provide?

TruDDR5 at 6400MT/s doubles bandwidth over DDR4, with 12 channels per CPU delivering higher throughput for HPC, AI, and virtualization. Dual-rank x4 design ensures low latency and stability under full load, critical for data center top-of-rack deployments.

Is the 4X77A93528 suitable for high-density memory configurations?

Yes, supports up to 3TB in SR635 V3 (12x 256GB) or 6TB in dual-socket SR675 V3 (24 DIMMs). 1DPC optimization maintains 6400MHz speeds; ECC prevents data corruption in mission-critical enterprise applications.

What is the voltage and power efficiency of this module?

Operates at 1.1V standard for DDR5, reducing power draw versus DDR4 while sustaining 6400MT/s. Ideal for dense server racks where thermal and energy efficiency impact TCO in large-scale data centers.

Does it support error correction and reliability features?

Full ECC on-die error correction with registered buffer ensures data integrity. 2Rx4 architecture and Lenovo TruDDR5 validation provide reliability for 24/7 operations in cloud, database, and analytics workloads.

4X77A93528 - Lenovo 4X77A93528 64GB 6400MHz 2Rx4 ECC RDIMM-A

Name: Lenovo 4X77A93528 64GB 6400MHz 2Rx4 ECC RDIMM-A
Brand: Lenovo
SKU: 4X77A93528
Price: 5068 USD
Availability: InStock

4X77A93528 - Lenovo 4X77A93528 64GB 6400MHz 2Rx4 ECC RDIMM-A | US IT Hardware

Product overview

The Lenovo ThinkSystem 64GB TruDDR5 6400MHz (2Rx4) RDIMM-A (4X77A93528) is engineered for high-performance computing in data center environments, specifically optimized for 5th Gen AMD EPYC processors in servers like SR635 V3 and SR675 V3. This ECC registered DIMM leverages 16Gb DRAM technology to deliver 6400MT/s transfer rates, enabling up to 3TB system memory in 12-channel (1DPC) configurations for superior bandwidth and low latency. Featuring a 288-pin form factor, 1.1V operation, and dual-rank x4 organization, it supports wire-speed memory access critical for virtualization, AI workloads, HPC, and large-scale databases. As part of Lenovo's TruDDR5 portfolio, it ensures stability under heavy loads with error correction, reducing downtime in enterprise deployments. Ideal for rack servers requiring scalable memory expansion without performance compromise.

64GB capacity with 16Gb DRAM technology per module.
6400MT/s speed for maximum memory bandwidth in 1DPC.
2Rx4 organization with ECC for error-free operation.
1.1V low power in 288-pin RDIMM form factor.
Optimized for 5th Gen AMD EPYC 12-channel memory.
Supports up to 3TB system memory in compatible servers.

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

Organization
Manufacturer part #	4X77A93528
Brand	Lenovo
Condition	New
ECC	Yes (On-die)
Model	64GB TruDDR5 6400MHz (2Rx4) RDIMM-A
Ranks	2Rx4
Speed	6400MHz (PC5-51200R)
Voltage	not specified
Capacity	64GB
CAS Latency	not specified
Feature Code	C0CK

Compatible systems

Validated for Lenovo ThinkSystem V3 servers with 5th Gen AMD EPYC; 1DPC DDR5 configurations up to 6400MHz.

Lenovo ThinkSystem
Model: SR635 V3
Form factor: 2U Rack
Generation: V3
12 DDR5 DIMMs, 1DPC, up to 6400MHz with 5th Gen AMD EPYC
Lenovo ThinkSystem
Model: SR675 V3
Form factor: 2U Rack
Generation: V3
24 DDR5 DIMMs (12 per CPU), 1DPC, up to 6400MHz with 5th Gen AMD EPYC
Lenovo ThinkSystem
Model: SD535 V3
Form factor: Edge
Generation: V3
Listed in ServerProven compatibility

Best for

HPC
High-speed 6400MT/s memory accelerates compute-intensive simulations and modeling in supercomputing clusters.
Virtualization
Supports dense VM hosting in 12-channel servers up to 3TB, optimizing resource utilization for enterprise clouds.
AI/ML Training
Low-latency TruDDR5 bandwidth feeds large datasets to GPU-accelerated workloads in SR675 V3 servers.

Lenovo 4X77A93528 64GB 6400MHz 2Rx4 ECC RDIMM-A

Product overview

Featuring

Compatible systems

Best for

Details

Shipping, warranty & returns

Customer reviews

Physical Characteristics

Frequently asked questions

Height	Standard
Pin Count	288-pin
Form Factor	RDIMM

Lenovo 4X77A93528 64GB 6400MHz 2Rx4 ECC RDIMM-A

Product overview

Featuring

Compatible systems

Best for

Details

Shipping, warranty & returns

Customer reviews

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Physical Characteristics

Frequently asked questions