Lenovo 8GB 3200MHz DDR4 PC4-25600 ECC Unbuffered CL22 288-Pin DIMM 1.2V Single Rank x8 Memory Module – 4X77A77494

Lenovo 8GB DDR4-3200 ECC Unbuffered DIMM — 4X77A77494

The Lenovo 4X77A77494 is an 8GB DDR4-3200 (PC4-25600) ECC Unbuffered DIMM operating at 1.2V with CL22 latency in a single rank x8 configuration. Designed for Lenovo servers and workstations supporting ECC UDIMM, it delivers DDR4-3200 speed with ECC error correction in a compact single rank configuration.

Key Features

• 8GB DDR4-3200 (PC4-25600) — ECC Unbuffered DIMM at DDR4-3200 speed
• ECC (Error Correcting Code) — single-bit error detection and correction
• Unbuffered (UDIMM) — compatible with select server and workstation platforms
• Single Rank x8
• 1.2V operating voltage
• CL22 latency
• 288-pin DIMM — standard DDR4 interface

Product Specifications

• Part Number: 4X77A77494
• Manufacturer: Lenovo
• OEM Status: OEM Lenovo
• Capacity: 8GB
• Speed: DDR4-3200 (PC4-25600)
• Type: ECC Unbuffered DIMM (ECC UDIMM)
• Form Factor: 288-Pin DIMM
• Voltage: 1.2V
• CAS Latency: CL22
• Rank: Single Rank x8

Memory Specifications

• Capacity: 8GB
• DDR Generation: DDR4
• Speed: 3200MHz (PC4-25600)
• CAS Latency: CL22
• Voltage: 1.2V
• ECC: Yes
• Buffered: Unbuffered (UDIMM)
• Rank: Single Rank x8
• Form Factor: 288-Pin DIMM

Performance Specifications

• Bandwidth: Up to 25,600 MB/s (PC4-25600)
• Operating Temperature: 0°C to 85°C

Use Cases

• ECC memory for Lenovo servers and workstations supporting DDR4-3200 ECC UDIMM
• Entry-level server memory with DDR4-3200 speed and ECC protection
• Workstation platforms requiring ECC UDIMM at DDR4-3200

Compatibility

• Lenovo servers and workstations supporting DDR4-3200 ECC UDIMM
• Not compatible with RDIMM-only server platforms
• Verify Lenovo compatibility matrix for specific system models

Frequently Asked Questions

What is the difference between Single Rank and Dual Rank?

Single Rank DIMMs have one set of DRAM chips accessed by the memory controller at a time. Dual Rank DIMMs have two sets, enabling rank interleaving for improved bandwidth. Single Rank modules are simpler and may be preferred when maximum DIMM count per channel is needed.

Is this compatible with non-Lenovo systems?

This is an OEM Lenovo module validated for Lenovo systems. Compatibility with non-Lenovo platforms is not guaranteed.

What is the difference between 4X77A77494 and 01KR359?

4X77A77494 is DDR4-3200 (PC4-25600) CL22 Single Rank, while 01KR359 is DDR4-2666 (PC4-21300) CL19 Single Rank. Choose based on your system”s supported memory speed.

The Lenovo 4X77A77494 delivers 8GB of DDR4-3200 ECC Unbuffered server memory in a single rank x8 configuration — validated for Lenovo servers and workstations requiring DDR4-3200 ECC UDIMM.