Samsung 128GB 2400MHz DDR4 PC4-19200 ECC Registered CL17 288-Pin Load Reduced DIMM 1.2V Quad Rank x8 Memory Module — M386AAK40B40-CUC

The Samsung M386AAK40B40-CUC is a 128GB DDR4-2400MHz ECC Load Reduced DIMM (LRDIMM) server memory module operating at 1.2V with CL17 latency. Featuring a 288-pin interface and Quad Rank x8 configuration, it delivers maximum-density enterprise memory with load reduction buffering for multi-processor server platforms requiring the highest per-slot capacity with reduced electrical load on the memory controller.

Key Features

• 128GB ultra-high-capacity ECC Load Reduced DIMM for enterprise servers
• DDR4-2400MHz (PC4-19200) for reliable enterprise memory performance
• Load Reduced DIMM (LRDIMM) — reduces electrical load for more DIMMs per channel
• Quad Rank x8 configuration for maximum per-slot memory density
• 1.2V low-voltage operation for energy-efficient server operation
• 288-pin interface — standard DDR4 LRDIMM form factor

Product Specifications

• Part Number: M386AAK40B40-CUC
• Manufacturer: Samsung
• Model: 128GB DDR4-2400 ECC Load Reduced DIMM
• OEM Status: Genuine Samsung OEM
• Capacity: 128GB
• Type: DDR4 ECC Load Reduced DIMM (LRDIMM)
• Speed: 2400MHz (PC4-19200)
• CAS Latency: CL17
• Voltage: 1.2V
• Rank / Organization: Quad Rank x8
• Pins: 288-Pin
• ECC: Yes

Memory Specifications

• Capacity: 128GB
• DIMM Type: Load Reduced ECC (LRDIMM)
• DDR Generation: DDR4
• Pin Count: 288-Pin
• Rank: Quad Rank (4Rx8)
• Voltage: 1.2V
• ECC: Yes (Error-Correcting Code)
• Load Reduction Buffer: Yes — reduces memory bus electrical load

Performance Specifications

• Speed: DDR4-2400MHz
• Bandwidth: PC4-19200
• CAS Latency: CL17
• XMP / JEDEC: JEDEC standard

Use Cases

• Maximum-capacity enterprise server memory requiring LRDIMM support
• Large-scale virtualization hosts requiring massive memory pools per channel
• In-memory database and analytics workloads (SAP HANA, Oracle)
• HPC workloads requiring maximum memory capacity per server node

Compatibility

• Compatible with servers supporting DDR4 ECC Load Reduced (LRDIMM) memory
• Not compatible with systems requiring RDIMM or UDIMM
• Compatible with Intel Xeon Scalable and E7 v4 server platforms supporting LRDIMM
• Verify server QVL (Qualified Vendor List) before ordering

Frequently Asked Questions

What is the difference between LRDIMM and RDIMM?

LRDIMM (Load Reduced DIMM) uses a memory buffer to reduce the electrical load on the memory controller, allowing more DIMMs per channel and higher total memory capacity compared to RDIMM. LRDIMM is used in servers requiring maximum memory density.

Is the M386AAK40B40-CUC compatible with Intel Xeon Scalable processors?

Yes, it is compatible with Intel Xeon Scalable server platforms supporting DDR4-2400 ECC LRDIMM. Verify your specific server's QVL before ordering.

Can LRDIMM and RDIMM be mixed in the same server?

No. LRDIMM and RDIMM cannot be mixed in the same server — all DIMMs in a system must be of the same type. Consult your server documentation before ordering.

The Samsung M386AAK40B40-CUC 128GB DDR4-2400 ECC Load Reduced DIMM delivers maximum-capacity enterprise memory for servers requiring the highest per-slot density. Order today for genuine Samsung LRDIMM quality with proven ECC reliability.