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Green rectangular DDR4 RDIMM module with black memory chips and gold edge connector

SAMSUNG

SAMSUNG M393AAG40M32-CAEBY 128GB DDR4 3200MHz RDIMM ECC desktop RAM

SKU CH-BVA8-0WCRK

128 GB DDR4 3200 MHz ECC RDIMM uses 3DS 2S2Rx4 architecture to deliver maximum capacity per 288-pin slot for enterprise servers and workstations

  • Total capacity128 GB
  • Rated speed3200 MHz
  • Product type288-Pin RDIMM
  • 128 GB capacity fits maximum memory in one slot using 3DS 2S2Rx4 architecture
  • Registered ECC corrects errors in real time for reliable data center uptime
  • 3200 MHz DDR4 speed delivers high bandwidth for enterprise workloads
  • 288-pin RDIMM form factor installs in standard server memory slots
  • Designed for Dell PowerEdge, HPE ProLiant, Cisco UCS and Supermicro platforms

128GB DDR4 RDIMM for Servers

This Samsung M393AAG40M32-CAEBY module delivers 128GB of DDR4 memory in a single 288-pin RDIMM form factor. It is engineered for enterprise servers and workstations that require high-density registered ECC memory for mission-critical workloads.

2S2Rx4 3DS Architecture Enables Maximum Density

The 3D stacked die configuration with a 2S2Rx4 organisation allows this module to reach 128GB capacity within one slot. This quad-rank design is the specific feature that determines whether a platform can accept the module, as the memory controller must support 3DS quad-rank RDIMMs.

Suits Enterprise Platforms Only

This memory fits Dell PowerEdge, HPE ProLiant, Cisco UCS and Supermicro systems that explicitly support 128GB quad-rank 3DS RDIMMs. It will not work in consumer desktops or laptops, nor in servers that lack registered ECC support or quad-rank 3DS compatibility.

How it compares

Measured against everything we stock in Desktop RAM, at today’s prices. Recalculated every night.

Price $861.99
Pricier than about 90% of the 3,647 comparable items (median $90.99).
Total capacity 128 GB
Higher than about 93% of the 3,251 comparable items (median 16 GB).
Price per GB $6.73 per GB
Typical for this category: the median of 3,251 items is $6.75 per GB.

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Specifications

Product
Brand nameSamsung
Model nameM393AAG40M32-CAEBY
Total capacity128 GB
Product type288-Pin RDIMM
Performance
Rated speed3200 MHz
Memory
ECC supportYes

Questions about this item

What does the 128 GB capacity mean for a server workload?

The 128 GB module uses 3D stacked die architecture with a 2S2Rx4 layout to deliver maximum memory density in a single 288-pin RDIMM slot, suited for high-capacity enterprise deployments.

How does the PC4-3200AA designation limit real-world speed?

PC4-3200AA certifies operation at 3200 MHz on DDR4; the registered buffer and ECC logic add latency, so sustained throughput is capped at that rated frequency on qualified platforms.

What physical slot and clearance does this RDIMM require?

It fits a standard 288-pin DDR4 RDIMM socket; the registered design and tall heatspreader need full-height DIMM clearance and a motherboard that explicitly supports quad-rank 3DS modules.

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