Samsung 128GB 3200MHz DDR4 PC4-25600 ECC Registered CL22 288-Pin DIMM 1.2V Quad Rank x4 Memory Module - M393AAG40M32-CAE

The Samsung M393AAG40M32-CAE is a 128GB DDR4 ECC Registered (RDIMM) server memory module operating at 3200MHz (PC4-25600) with CAS latency CL22 and 1.2V operating voltage. This ultra-high-density 128GB Quad Rank module delivers the maximum DDR4 memory capacity per slot available — enabling massive total system memory configurations for the most memory-intensive enterprise workloads including large-scale virtualization, in-memory databases, AI/ML, and high-performance computing. Error-Correcting Code (ECC) technology continuously detects and corrects single-bit memory errors in real time, ensuring data integrity in mission-critical environments. The registered (buffered) design reduces electrical load on the memory controller, enabling stable high-density multi-DIMM configurations across enterprise server platforms.

Key Features

• 128GB Ultra-High Density: Maximum DDR4 capacity per slot — achieve the highest possible total system memory with fewer DIMMs
• 3200MHz — Fastest DDR4 Speed: PC4-25600 delivers the highest bandwidth available on DDR4 server platforms
• ECC Error Protection: Real-time single-bit error correction ensures data integrity for mission-critical server workloads
• Registered (Buffered) Design: Enables stable, high-density multi-DIMM server configurations without signal degradation
• Samsung DRAM: Industry-leading manufacturing quality with proven enterprise-grade reliability and longevity

Technical Specifications

• Part Number: M393AAG40M32-CAE
• Manufacturer: Samsung
• Memory Type: DDR4 SDRAM
• Module Type: RDIMM (Registered / Buffered)
• Capacity: 128GB
• Speed: 3200MHz (PC4-25600)
• CAS Latency: CL22
• Timing: 22-22-22
• Voltage: 1.2V
• Form Factor: 288-Pin DIMM
• Rank: Quad Rank (4Rx4)
• Die Organization: x4
• Data Width: 72-bit (64-bit + 8-bit ECC)
• Error Correction: SECDED (Single-bit correction, Double-bit detection)
• Operating Temperature: 0°C to 85°C

Use Cases

• Massive-Scale Virtualization: VMware vSphere, Microsoft Hyper-V, and KVM deployments requiring the highest possible memory capacity per DDR4 server node
• In-Memory Databases: SAP HANA, Oracle TimesTen, and VoltDB deployments requiring terabyte-scale memory pools across server clusters
• AI/ML Training Infrastructure: CPU-side memory for large-scale AI/ML training pipelines and data preprocessing at maximum DDR4 capacity
• HPC and Scientific Computing: MPI-based simulation and modeling workloads requiring maximum per-node memory capacity

Compatibility

• Compatible with DDR4 RDIMM slots supporting Quad Rank modules — verify your platform's Quad Rank DIMM support before ordering
• CAE is the base qualification code for this Samsung 128GB DDR4 3200MHz Quad Rank x4 RDIMM series — verify against your server's memory QVL before ordering
• Do not mix with DDR4 UDIMMs, LRDIMMs, or Dual Rank modules where Quad Rank mixing is restricted
• For multi-DIMM stability, populate channels with matched capacity, speed, and rank modules

Frequently Asked Questions

What is the advantage of a Quad Rank DIMM over a Dual Rank DIMM?

Quad Rank DIMMs pack twice the DRAM ranks of Dual Rank modules, enabling higher capacity per slot (128GB vs 64GB). However, some server platforms limit the number of Quad Rank DIMMs per channel due to increased electrical load — always verify your server's Quad Rank DIMM support and per-channel limits in the QVL before ordering.

What does the CAE base qualification code indicate?

CAE is Samsung's base qualification code for this 128GB DDR4 3200MHz Quad Rank x4 RDIMM series. Variants with extended suffixes (CAECO, CAEBY) represent specific OEM or regional qualifications — always verify against your server vendor's QVL before purchase.

Is this module compatible with DDR5 servers?

No — DDR4 and DDR5 are not interchangeable. This is a DDR4 module requiring a DDR4-compatible server platform. Always verify your server's memory type requirement before ordering.

Whether you are building terabyte-scale virtualization clusters, deploying in-memory database infrastructure, or maximizing per-node memory for AI/ML workloads, the Samsung M393AAG40M32-CAE delivers the 128GB DDR4 3200MHz capacity, ECC protection, and Samsung manufacturing quality your most demanding enterprise server deployments require.