HPE 32GB 2Rx4 DDR4-2666V PC4-21300 ECC Registered Memory Samsung M393A4K40DB2-CTD 815100-B21 850881-001 840758-091

Upgrade your server infrastructure with this genuine HPE 32GB DDR4 Registered ECC memory module, manufactured by Samsung and identified by part number M393A4K40DB2-CTD. Designed for enterprise-class HPE ProLiant servers, this module delivers reliable performance, enhanced data integrity, and improved system stability for virtualization, database management, cloud computing, and other demanding workloads.

Operating at 2666MT/s (PC4-21300), this ECC Registered DIMM helps reduce memory-related errors while providing the performance and reliability required in mission-critical environments. Its 2Rx4 rank configuration and low-voltage DDR4 design make it an excellent choice for expanding memory capacity in compatible HPE servers.

Key Features

• Capacity: 32GB
• Memory Type: DDR4 ECC Registered (RDIMM)
• Speed: 2666MT/s (PC4-21300)
• Rank Configuration: 2Rx4
• Data Width: x4
• Form Factor: 288-Pin RDIMM
• Error Checking: ECC (Error-Correcting Code)
• Voltage: 1.2V
• Manufacturer: Samsung
• Samsung Part Number: M393A4K40DB2-CTD
• HPE Part Numbers: 815100-B21, 850881-001, 840758-091

Benefits

• Increases available memory for demanding enterprise applications
• ECC protection helps maintain data integrity and system reliability
• Registered design supports server-grade platforms and larger memory configurations
• Ideal for virtualization hosts, database servers, and cloud environments
• HPE-qualified memory designed for ProLiant server compatibility

Alternative Part Numbers

• M393A4K40DB2-CTD
• 815100-B21
• 850881-001
• 840758-091
• P00924-B21 (HPE SmartMemory 32GB DDR4-2666 RDIMM equivalent specification)
• 809082-591
• 809082-B21

Compatible Memory Modules

For best results, install with matching specifications:

• HPE 32GB 2Rx4 DDR4-2666 ECC RDIMM (815100-B21)
• Samsung M393A4K40CB2-CTD 32GB DDR4-2666 ECC RDIMM
• Samsung M393A4K40BB2-CTD 32GB DDR4-2666 ECC RDIMM
• HPE SmartMemory 32GB DDR4-2666 Registered ECC RDIMM modules
• Other 32GB 2Rx4 DDR4-2666V PC4-21300 ECC Registered RDIMMs approved for the same HPE server platform

Compatible Server Families

Commonly used in select:

• HPE ProLiant DL360 Gen10
• HPE ProLiant DL380 Gen10
• HPE ProLiant ML350 Gen10
• HPE Apollo Series Servers
• Other HPE Gen10 servers supporting DDR4-2666 ECC RDIMM memory

Technical Specifications

• SKU: M393A4K40DB2-CTD-HPE
• Capacity: 32GB
• Memory Technology: DDR4 SDRAM
• Speed Grade: DDR4-2666V
• PC Rating: PC4-21300
• Error Correction: ECC
• Signal Processing: Registered
• Rank: Dual Rank (2Rx4)
• Pins: 288-Pin
• Voltage: 1.2V
• Manufacturer: Samsung
• Application: Enterprise Servers and Workstations

Note: This module is an ECC Registered RDIMM and is not compatible with desktop systems, laptops, UDIMM memory, or LRDIMM-only configurations. Always verify compatibility with your specific server model before purchase.