Samsung 128GB 2933MHz DDR4 PC4-23400 ECC Registered CL21 288-Pin DIMM 1.2V Quad Rank x4 Memory Module — M393AAG40M3B-CYFC0

The Samsung M393AAG40M3B-CYFC0 is a 128GB DDR4-2933MHz ECC Registered (RDIMM) server memory module operating at 1.2V with CL21 latency. Featuring a 288-pin interface and Quad Rank x4 configuration, it delivers maximum-capacity enterprise memory for multi-processor server platforms requiring high-density registered buffering for mission-critical workloads.

Key Features

• 128GB ultra-high-capacity ECC Registered DIMM for enterprise servers
• DDR4-2933MHz (PC4-23400) for high-bandwidth server memory performance
• Registered DIMM (RDIMM) for stability in dense multi-DIMM configurations
• Quad Rank x4 configuration for maximum per-slot memory density
• 1.2V low-voltage operation for energy-efficient server operation
• 288-pin interface — standard DDR4 RDIMM form factor

Product Specifications

• Part Number: M393AAG40M3B-CYFC0
• Manufacturer: Samsung
• Model: 128GB DDR4-2933 ECC Registered DIMM
• OEM Status: Genuine Samsung OEM
• Capacity: 128GB
• Type: DDR4 ECC Registered DIMM (RDIMM)
• Speed: 2933MHz (PC4-23400)
• CAS Latency: CL21
• Voltage: 1.2V
• Rank / Organization: Quad Rank x4
• Pins: 288-Pin
• ECC: Yes

Memory Specifications

• Capacity: 128GB
• DIMM Type: Registered ECC (RDIMM)
• DDR Generation: DDR4
• Pin Count: 288-Pin
• Rank: Quad Rank (4Rx4)
• Voltage: 1.2V
• ECC: Yes (Error-Correcting Code)
• Register Buffer: Yes

Performance Specifications

• Speed: DDR4-2933MHz
• Bandwidth: PC4-23400
• CAS Latency: CL21
• XMP / JEDEC: JEDEC standard

Use Cases

• Maximum-capacity enterprise server memory for dual and quad-socket platforms
• Large-scale virtualization hosts requiring massive memory pools
• In-memory database and analytics workloads (SAP HANA, Oracle)
• HPC and AI/ML workloads requiring high-capacity ECC RDIMM

Compatibility

• Compatible with servers supporting DDR4 ECC Registered (RDIMM) memory
• Compatible with Intel Xeon Scalable and AMD EPYC server platforms
• Quad Rank — verify server maximum rank support per channel before ordering
• Verify server QVL (Qualified Vendor List) before ordering

Frequently Asked Questions

What does Quad Rank x4 mean?

Quad Rank x4 means the module has four ranks of memory chips, each using x4-wide chips. This maximizes per-slot capacity but may limit the number of DIMMs per channel — verify your server's rank support before ordering.

Is the M393AAG40M3B-CYFC0 compatible with Intel Xeon Scalable processors?

Yes, it is compatible with Intel Xeon Scalable server platforms supporting DDR4-2933 ECC RDIMM. Verify your specific server's QVL before ordering.

What is the suffix C0 in M393AAG40M3B-CYFC0?

The suffix C0 is a Samsung production revision code indicating a specific manufacturing revision of the module. It is functionally equivalent to other CYFC0 variants.

The Samsung M393AAG40M3B-CYFC0 128GB DDR4-2933 ECC Registered DIMM delivers maximum-capacity enterprise memory for the most demanding server workloads. Order today for genuine Samsung RDIMM quality at 128GB per slot.