Lenovo 16GB DDR4-2400 ECC Unbuffered DIMM — 4X70G88326

The Lenovo 4X70G88326 is a 16GB DDR4-2400 (PC4-19200) ECC Unbuffered DIMM operating at 1.2V with CL17 latency in a dual rank configuration. Designed for Lenovo ThinkSystem servers and workstations supporting ECC UDIMM, it delivers error-correcting memory without the register buffer of RDIMM — suitable for platforms with lower DIMM count requirements.

Key Features

• 16GB DDR4-2400 (PC4-19200) — ECC Unbuffered DIMM
• ECC (Error Correcting Code) — single-bit error detection and correction
• Unbuffered (UDIMM) — compatible with select server and workstation platforms
• Dual Rank — optimized for capacity per DIMM slot
• 1.2V operating voltage
• CL17 latency
• 288-pin DIMM — standard DDR4 interface

Product Specifications

• Part Number: 4X70G88326
• Manufacturer: Lenovo
• OEM Status: OEM Lenovo
• Capacity: 16GB
• Speed: DDR4-2400 (PC4-19200)
• Type: ECC Unbuffered DIMM (ECC UDIMM)
• Form Factor: 288-Pin DIMM
• Voltage: 1.2V
• CAS Latency: CL17
• Rank: Dual Rank

Memory Specifications

• Capacity: 16GB
• DDR Generation: DDR4
• Speed: 2400MHz (PC4-19200)
• CAS Latency: CL17
• Voltage: 1.2V
• ECC: Yes
• Buffered: Unbuffered (UDIMM)
• Rank: Dual Rank
• Form Factor: 288-Pin DIMM

Performance Specifications

• Bandwidth: Up to 19,200 MB/s (PC4-19200)
• Operating Temperature: 0°C to 85°C

Use Cases

• ECC memory for Lenovo servers and workstations supporting ECC UDIMM
• Entry-level server memory with error correction
• Workstation platforms requiring ECC without RDIMM support

Compatibility

• Lenovo servers and workstations supporting DDR4-2400 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 ECC UDIMM and RDIMM?

ECC UDIMM provides error correction without a register chip, making it compatible with workstation and select server platforms. RDIMM uses a register for signal buffering and supports higher DIMM counts per channel in server platforms. They are not interchangeable.

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.

Can this run in a DDR4-3200 system?

Yes, DDR4-2400 modules can run in DDR4-3200 systems but will operate at DDR4-2400 speed. For maximum performance, use DDR4-3200 modules in DDR4-3200 platforms.

The Lenovo 4X70G88326 delivers 16GB of DDR4-2400 ECC Unbuffered server memory in a dual rank configuration — validated for Lenovo servers and workstations requiring ECC UDIMM for reliable enterprise operation.