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Green rectangular DDR5 RDIMM module with black chips on both sides, gold edge connector, no heat spreader

A-Tech

A-Tech 64GB DDR5 4800 ECC RDIMM 2Rx4 Hynix HMCG94AEBRA103N 108N 123N MEBRA102N 103N Server RAM

SKU CH-WK80-FS6X8

64GB DDR5 4800 ECC registered DIMM with 2Rx4 rank and 1.10V operation for server upgrades

  • Capacity64GB
  • Type288-Pin DDR5 RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS Latency40
  • Voltage1.10V
  • ECCYes
  • 64 GB capacity supports heavy server workloads
  • DDR5 4800 speed delivers high bandwidth for data-intensive tasks
  • ECC registered design protects data integrity in mission-critical systems
  • 2Rx4 dual-rank organisation maximises memory density per slot
  • 10 V operation matches DDR5 standard for efficient power use

64GB DDR5 4800 ECC RDIMM

This 64GB DDR5 module operates at 4800MHz with ECC and registered buffering for server and workstation platforms. It replaces Hynix part numbers HMCG94AEBRA103N, HMCG94AEBRA108N, HMCG94AEBRA123N, HMCG94MEBRA102N and HMCG94MEBRA103N. The 2Rx4 organisation and 1.10V voltage match the original specifications. Systems requiring unbuffered memory or non-ECC operation cannot use this module.

288-pin RDIMM build and daily handling

The module uses a standard 288-pin DDR5 RDIMM form factor without a heat spreader, relying on chassis airflow for cooling. Registered signalling reduces electrical load on the memory controller, which is essential for multi-module configurations in dense servers. Installers must follow the system manual for correct slot population and channel guidelines to ensure stability. Buyers who need a low-profile heat spreader for restricted clearance should look elsewhere.

DDR5 4800 interface limits

The DDR5 4800 interface delivers a peak transfer rate of PC5-38400 with a CAS latency of 40. Bandwidth and latency are fixed by the JEDEC standard for this speed grade; higher throughput requires platform support for faster DDR5 speeds. ECC correction adds reliability for critical workloads but does not increase raw bandwidth. Systems limited to lower DDR5 data rates will downclock the module automatically.

Highlights

  • 64 GB capacity supports heavy server workloads
  • DDR5 4800 speed delivers high bandwidth for data-intensive tasks
  • ECC registered design protects data integrity in mission-critical systems
  • 2Rx4 dual-rank organisation maximises memory density per slot
  • 10 V operation matches DDR5 standard for efficient power use

Specifications

BrandA-Tech
SeriesCompatible Replacement for Hynix HMCG94AEBRA103N HMCG94AEBRA108N HMCG94AEBRA123N HMCG94MEBRA102N HMCG94MEBRA103N
ModelA-Tech 64GB DDR5-4800 ECC RDIMM Server RAM Module
Capacity64GB
Type288-Pin DDR5 RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS Latency40
Voltage1.10V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
ChipsetMajor Brand Chipset
Heat SpreaderNo
FeaturesMajor Brand DRAM IC Chips

Questions about this item

Does the DDR5-4800 PC5-38400 interface cap real-world throughput to the module's rated speed?

The module runs at DDR5 4800 MT/s with PC5-38400 bandwidth; actual throughput depends on the server platform, memory controller, and channel configuration.

What physical slot and clearance does the 288-pin DDR5 RDIMM need to fit?

It requires a standard 288-pin DDR5 DIMM slot; the module has no heat spreader, so it fits in tight server chassis with minimal vertical clearance.

How is the ECC RDIMM installed, and what step do people often get wrong?

Align the key notch with the slot, press firmly until both retention clips click, and follow the system manual for correct channel population — mixing registered and unbuffered DIMMs is the common error.

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