SK Hynix 64GB 2Rx4 DDR5-4800B PC5-38400 ECC Registered Memory HMCG94MEBRA123N

The SK Hynix HMCG94MEBRA123N 64GB DDR5-4800 ECC Registered Memory Module is a high-performance server-grade RDIMM designed for enterprise servers, data centers, and professional workstations. Built with DDR5 technology and ECC error correction, this module provides improved bandwidth, higher capacity, and enhanced reliability for demanding workloads such as virtualization, high-performance computing (HPC), and cloud infrastructure.

Operating at 4800 MT/s (DDR5-4800 / PC5-38400) with a dual-rank 2Rx4 architecture, this module ensures stable performance and efficient memory bandwidth for modern server platforms. As a Registered DIMM (RDIMM), it includes a register buffer that improves signal integrity and scalability in multi-DIMM server configurations.

• 64GB DDR5 ECC Registered (RDIMM) memory module

• High-speed DDR5-4800 (PC5-38400) performance

• ECC error correction for enhanced data integrity

• 2Rx4 dual-rank architecture for optimized server performance

• Low-voltage 1.1V operation for improved energy efficiency

• Built using SK Hynix M-die DRAM technology

• Designed for enterprise servers and professional workstations

• Manufacturer: SK Hynix

• Part Number: HMCG94MEBRA123N

• Capacity: 64GB (1 × 64GB module)

• Memory Type: DDR5 SDRAM

• Standard: DDR5-4800B / PC5-38400

• Data Rate: 4800 MT/s

• Rank: 2Rx4 (Dual Rank)

• Error Correction: ECC (Error-Correcting Code)

• Signal Processing: Registered (RDIMM)

• CAS Latency: CL40

• Operating Voltage: 1.1V

• Pin Count: 288-Pin

• Form Factor: RDIMM

• Module Length: 133 mm (5.23 inches)

• Module Height: ~30 mm (1.18 inches)

• Weight: ~90 g (0.20 lbs)

DDR5 memory introduces several improvements over previous DDR4 generations:

• Higher bandwidth for faster data processing

• Improved power efficiency with reduced operating voltage

• On-die ECC enhancements for improved reliability

• Better scalability for high-density memory configurations

These features make the module ideal for virtualization clusters, large databases, AI workloads, and enterprise cloud computing environments.

This memory module is widely compatible with enterprise hardware from major manufacturers supporting DDR5 ECC RDIMM memory.

Dell PowerEdge (16th Generation)

• Dell PowerEdge R660

• Dell PowerEdge R660xs

• Dell PowerEdge R6615

• Dell PowerEdge R6625

• Dell PowerEdge R760

• Dell PowerEdge R760xa

• Dell PowerEdge R760xd2

• Dell PowerEdge R760xs

• Dell PowerEdge R7615

• Dell PowerEdge R7625

• Dell PowerEdge R860

• Dell PowerEdge R960

• Dell PowerEdge T560

HPE ProLiant Gen11

• HPE ProLiant DL360 Gen11

• HPE ProLiant DL380 Gen11

• HPE ProLiant DL560 Gen11

• HPE ProLiant ML350 Gen11

• HPE ProLiant Synergy 480 Gen11

Lenovo ThinkSystem (V3 Generation)

Compatible with ThinkSystem V3 servers supporting DDR5 ECC RDIMM memory.

Supermicro

Compatible with systems such as:

• Supermicro ARS-111M-NR

and other platforms using DDR5 server motherboards (for example those based on the R13SPD series).

Workstations

Also compatible with select enterprise workstations supporting DDR5 ECC RDIMM memory, including:

• Dell Precision 7000 series workstations

• HP Z-Series workstations with Intel Xeon processors

This SK Hynix memory module is often used as the OEM component behind memory kits from major server vendors.

Dell Equivalent Part Numbers

• AC679627

• AC529145

• 370-BBQQ

• PDHXJ

• J52K5

• AC239379

HPE Equivalent Part Numbers

• P43331-B21

• P46970-H21

• P50312-B21

• P58358-H21

• P62604-B21

• P76177-001

Other OEM Equivalents

• MTC40F2046S1RC48BA1 (Micron equivalent)

• RDIMM Only: Cannot be mixed with UDIMM or LRDIMM modules.

• DDR5 Platform Required: Not compatible with DDR4 systems due to different pin layout and voltage requirements.

• Server/Workstation Use Only: Not supported in consumer desktop motherboards.

This SK Hynix 64GB DDR5-4800 ECC Registered RDIMM (HMCG94MEBRA123N) delivers the high bandwidth, stability, and reliability required for modern enterprise computing environments, making it an excellent choice for data centers, virtualization infrastructure, and high-performance server platforms.