Increase the performance and memory capacity of your enterprise server with the IBM 78P4200 / Samsung M393AAK40B42-CWD 128GB DDR4-2666 ECC Registered Memory Module. Designed for modern data centers, virtualization environments, cloud infrastructure, and mission-critical applications, this high-density 128GB RDIMM delivers exceptional reliability, scalability, and performance for demanding enterprise workloads.
Built by Samsung and offered under the IBM part number 78P4200, this module features DDR4-2666 (PC4-21300V) technology, ECC (Error-Correcting Code) protection, and an advanced 2S4Rx4 / 8Rx4 Octal Rank configuration. Using innovative 3DS (Three-Dimensional Stacking) TSV technology, it achieves ultra-high memory density while maintaining the stability and efficiency required in enterprise-class server environments.
Operating at just 1.2V, this 288-pin Registered DIMM (RDIMM) helps reduce power consumption while providing reliable performance for memory-intensive workloads including virtualization, database management, analytics, artificial intelligence, and high-performance computing.
Key Features
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Capacity: 128GB
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Manufacturer: Samsung (IBM Branded)
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IBM Part Number: 78P4200
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Samsung Part Number: M393AAK40B42-CWD
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Memory Type: DDR4 ECC Registered (RDIMM)
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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
- IBM
- Lenovo ThinkSystem
- Dell PowerEdge
- HPE ProLiant & Apollo
- Cisco UCS
- Fujitsu PRIMERGY
- Supermicro SuperServer
- ASUS Server Platforms
Popular Compatible Server Models
IBM / Lenovo
- ThinkSystem SR630
- ThinkSystem SR650
- ThinkSystem SR850
- ThinkSystem SR860
- ThinkSystem SR950
- ThinkSystem SN550
- ThinkSystem SN850
- ThinkSystem SD530
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
- Synergy 480 Gen10
- Synergy 660 Gen10
- Apollo 2000 Gen10
- Apollo 4200 Gen10
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 Compatibility Notes
- Designed exclusively for enterprise servers and high-end workstations
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Not compatible with desktop PCs, gaming systems, or laptops
- Requires server platforms that support DDR4 ECC Registered (RDIMM) memory
- Cannot be mixed with UDIMM or LRDIMM memory modules
- Best suited for Intel Xeon Scalable and AMD EPYC server platforms that support high-density 3DS memory modules
Ideal for virtualization clusters, cloud deployments, enterprise databases, high-performance computing, and memory-intensive workloads, the IBM 78P4200 / Samsung M393AAK40B42-CWD 128GB DDR4-2666 ECC Registered RDIMM provides the capacity, stability, and enterprise-class reliability required for today's demanding server environments.
