Boost your server's performance and memory capacity with the Samsung M393AAK40B42-CWD 128GB DDR4-2666 ECC Registered Memory Module. Designed for enterprise-class servers and data center environments, this high-capacity 128GB RDIMM delivers reliable performance, advanced error correction, and exceptional scalability for virtualization, cloud computing, database management, AI workloads, and mission-critical applications.
Featuring DDR4-2666 (PC4-21300V) technology, ECC (Error-Correcting Code) protection, and a 2S4Rx4 / 8Rx4 Octal Rank architecture, this memory module utilizes advanced 3DS (Three-Dimensional Stacking) TSV technology to achieve ultra-high density while maintaining system stability and efficiency. Operating at a low 1.2V, it provides excellent performance with reduced power consumption for demanding enterprise environments.
This 288-pin Registered DIMM (RDIMM) is compatible with select server platforms from Dell PowerEdge, HPE ProLiant, Lenovo ThinkSystem, Cisco UCS, Fujitsu PRIMERGY, Supermicro, and ASUS, making it an ideal upgrade for supported Intel Xeon Scalable and AMD EPYC based systems.
Key Features
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Capacity: 128GB
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Memory Type: DDR4 ECC Registered (RDIMM)
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Part Number: M393AAK40B42-CWD
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Speed: 2666MHz (PC4-21300V / PC4-2666V)
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Form Factor: 288-Pin DIMM
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Rank Configuration: 2S4Rx4 / 8Rx4 Octal Rank
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Technology: Advanced 3DS TSV Stacked Memory
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ECC Support: Yes
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Voltage: 1.2V
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Registered/Buffered: Yes (RDIMM)
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Application: Enterprise Servers & Workstations
Compatible Server Manufacturers
- Dell PowerEdge
- HPE ProLiant & Apollo
- Lenovo ThinkSystem & ThinkAgile
- Cisco UCS
- Fujitsu PRIMERGY
- Supermicro SuperServer
- ASUS Server Platforms
Popular Compatible Server Models
Dell
- PowerEdge R640
- PowerEdge R740 / R740xd
- PowerEdge R840
- PowerEdge R940 / R940xa
- PowerEdge C6420
- PowerEdge T640
- PowerEdge MX740c / MX840c
HPE
- ProLiant DL360 Gen10
- ProLiant DL380 Gen10
- ProLiant DL560 Gen10
- ProLiant DL580 Gen10
- ProLiant BL460c Gen10
- Synergy 480 Gen10
- Synergy 660 Gen10
- Apollo 2000 Gen10
- Apollo 4200 Gen10
Lenovo
- ThinkSystem SR630
- ThinkSystem SR650
- ThinkSystem SR850
- ThinkSystem SR860
- ThinkSystem SR950
- ThinkSystem SN550
- ThinkSystem SN850
- ThinkSystem SD530
Cisco
- UCS C220 M5
- UCS C240 M5
- UCS C480 M5
- UCS B200 M5
- UCS B480 M5
Supermicro
- SuperServer 1029P-WTR
- SuperServer 2029P-C1R
- A+ Server 1013S-MCT
- H11DSU-iN
- H11SSW-iN
Fujitsu
- PRIMERGY RX2530 M4/M5
- PRIMERGY RX2540 M4/M5
- PRIMERGY CX2550 M4
- PRIMERGY CX2560 M5
ASUS
- RS500-E9 Series
- RS700-E9 Series
- KNPA-U16
Important: This memory module is designed exclusively for servers and enterprise workstations that support ECC Registered DDR4 memory. It is not compatible with desktop PCs, gaming systems, or laptops, and cannot be mixed with UDIMM or LRDIMM memory within the same memory configuration.
Ideal for virtualization, database servers, cloud infrastructure, high-performance computing, and memory-intensive enterprise workloads, the Samsung M393AAK40B42-CWD 128GB DDR4-2666 ECC RDIMM delivers the capacity, reliability, and performance required by today's data centers.
