SK hynix HMCG84AGBRA190N – 32GB DDR5-5600 ECC Registered Server Memory

Description

The SK hynix HMCG84AGBRA190N provides 32GB of high-speed DDR5 server memory for systems requiring reliable ECC-protected and registered memory. With a data rate of 5600MT/s, the module provides a theoretical peak bandwidth of 44.8GB/s, making it suitable for demanding server and workstation workloads.

Its 1Rx4 single-rank architecture is designed for modern DDR5 server memory controllers and high-density memory configurations. The ECC capability helps detect and correct certain memory errors, improving data integrity and system reliability in environments where uninterrupted operation is important.

As a Registered DIMM, the module is intended for platforms specifically designed to use DDR5 RDIMM memory. It should not be substituted for standard DDR5 UDIMM memory unless the host platform explicitly supports the required memory type.

The exact HMCG84AGBRA190N part number appears in MSI’s server Approved Vendor Lists as SK hynix DDR5 ECC Registered DIMM, 32GB, 1Rx4, 5600MT/s. It is also listed as tested memory in System76’s Thelio Major documentation.

3. Complete Technical Specification

Specification	Details
Manufacturer	SK hynix
Part Number / MPN	HMCG84AGBRA190N
Memory Type	DDR5 SDRAM
Capacity	32GB
Module Type	ECC Registered DIMM (RDIMM)
Form Factor	288-pin DIMM
Data Rate	5600MT/s
Memory Speed	DDR5-5600
Module Bandwidth	PC5-44800
Theoretical Bandwidth	Up to 44.8GB/s
ECC	Yes
Registered / Buffered	Registered
Rank	1Rx4 – Single Rank
Organization	x4
Voltage	1.1V
Base Clock	2800MHz
Memory Technology	DDR5
Pin Count	288-pin
DRAM Configuration	16Gb x4-class organization
Application	Servers / Workstations
Memory Architecture	ECC Registered DDR5
Manufacturer Die	SK hynix A-die, as reported by module references
Operating Temperature	Platform-dependent; follow host-system specifications

The core capacity, DDR5-5600 speed, ECC RDIMM type, 1Rx4 organization and 1.1V characteristics are supported by multiple references, including MSI qualification documentation and independent part-number databases.

4. Applications

The HMCG84AGBRA190N is suitable for:

Enterprise server memory upgrades
Data-center infrastructure
Virtualization servers
Cloud-computing platforms
Database servers
Web and application servers
File and storage servers
High-performance workstations
Engineering and scientific computing
Data analytics
Professional content-production systems supporting ECC RDIMM
High-memory enterprise applications

5. Compatibility

The module requires a host system that specifically supports DDR5 ECC Registered DIMMs (RDIMM) and the appropriate memory speed/rank configuration.

The exact HMCG84AGBRA190N is qualified by MSI for server platforms, where it is listed as:

SK hynix / DDR5 / ECC / Registered DIMM / 32GB / 1Rx4 / 5600MT/s / HMCG84AGBRA190N.

It is also listed as tested memory for System76 Thelio Major configurations supporting DDR5 memory at 5600MHz.

Compatibility warning: DDR5 RDIMM is different from DDR5 UDIMM and DDR5 SO-DIMM. The server or workstation motherboard must explicitly support ECC Registered DDR5 memory.

For systems using multiple DIMMs, installation should follow the manufacturer’s recommended population order, channel configuration, supported capacities, and memory-speed rules.