Lenovo 64GB 5600MHz DDR5 PC5-44800 ECC Registered DIMM Dual Rank x4 Memory Module – SM37B46518

Lenovo 64GB DDR5-5600 ECC Registered DIMM — SM37B46518

The Lenovo SM37B46518 is a 64GB DDR5-5600 (PC5-44800) ECC Registered DIMM in a dual rank x4 configuration. Part of the ThinkSystem DDR5-5600 64GB RDIMM family, it delivers high-capacity DDR5 server memory with ECC reliability for Lenovo ThinkSystem servers supporting DDR5-5600.

Key Features

• 64GB DDR5-5600 (PC5-44800) — high-capacity DDR5 server RDIMM
• ECC Registered (RDIMM) — error correction and signal buffering
• Dual Rank x4 — optimized for high-capacity per DIMM slot
• 288-pin DIMM — DDR5 server memory interface
• Validated for Lenovo ThinkSystem servers

Product Specifications

• Part Number: SM37B46518
• Manufacturer: Lenovo
• OEM Status: OEM Lenovo ThinkSystem
• Capacity: 64GB
• Speed: DDR5-5600 (PC5-44800)
• Type: ECC Registered DIMM (RDIMM)
• Form Factor: 288-Pin DIMM
• Rank: Dual Rank x4

Memory Specifications

• Capacity: 64GB
• DDR Generation: DDR5
• Speed: 5600MHz (PC5-44800)
• ECC: Yes
• Buffered: Registered (RDIMM)
• Rank: Dual Rank x4
• Form Factor: 288-Pin DIMM

Performance Specifications

• Bandwidth: Up to 44,800 MB/s (PC5-44800)
• Operating Temperature: 0°C to 85°C

Use Cases

• High-capacity DDR5 server memory for Lenovo ThinkSystem platforms
• AI inference, virtualization, and in-memory database workloads
• High-density memory configurations in ThinkSystem DDR5 servers

Compatibility

• Lenovo ThinkSystem servers supporting DDR5-5600 RDIMM
• Not compatible with DDR4 slots or consumer platforms
• Verify Lenovo ThinkSystem compatibility matrix for specific server models

Frequently Asked Questions

What is the difference between SM37B46518, 03LE888, 03LE886, and 4X77A88052?

All four are Lenovo 64GB DDR5-5600 ECC Registered Dual Rank x4 DIMMs — alternate part numbers that may differ in DRAM manufacturer or specific server model validation. Verify from Lenovo”s compatibility matrix.

Is DDR5-5600 faster than DDR5-4800?

Yes, DDR5-5600 provides 44,800 MB/s bandwidth vs DDR5-4800”s 38,400 MB/s — a 17% improvement. Choose DDR5-5600 for platforms that support it.

Is this compatible with non-Lenovo servers?

This is an OEM Lenovo ThinkSystem RDIMM validated for ThinkSystem servers. Compatibility with non-Lenovo servers is not guaranteed.

The Lenovo SM37B46518 delivers 64GB of DDR5-5600 ECC Registered server memory in a dual rank x4 configuration — validated for Lenovo ThinkSystem DDR5 servers requiring high-capacity reliable RDIMM for enterprise workloads.