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Green circuit board with gold contacts and black memory chips, no heat spreader

NEMIX RAM

NEMIX RAM 128GB DDR5 4800 CL40 1.1V ECC RDIMM 4Rx4 SuperMicro memory upgrade

SKU CH-GSRA-H912M

A 128 GB DDR5 registered ECC module running at 4800 MT/s with CL40 latency and 1.1 V operation for SuperMicro servers

  • Total capacity128 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128 GB capacity handles large workloads
  • DDR5 4800 speed delivers high throughput
  • ECC registered design protects data integrity
  • 1 V operation reduces power draw
  • SuperMicro validated compatibility ensures stable operation

Capacity and purpose

This 128GB DDR5 module is built for Supermicro servers and workstations that require registered ECC memory. It suits administrators expanding memory capacity in compatible platforms for virtualization, database or compute workloads.

Build integration

The single 288-pin RDIMM installs in a free DDR5 slot on a supported Supermicro motherboard and operates at 1.1V. Registered buffering and ECC reduce electrical load on the memory controller while protecting data integrity in multi-module configurations.

Sustained operation

Rated at 4800 MT/s with CL40 latency, the module uses major OEM DRAM chips tested under load for stability. The 4Rx4 organization supports high-density population without increasing voltage, helping maintain consistent throughput during extended server duties.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $4,026.99
Pricier than about 77% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $31.46 per GB
Pricier than about 90% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineSuperMicro Server/Workstation Compatible Series Memory
Model nameSuperMicro DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-744K1
Total capacity128 GB
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank4Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items128 GB (1 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

What is the CAS latency of this DDR5 4800 module?

The module runs at CL40 latency at its rated 4800 MT/s speed.

Does this registered ECC RDIMM generate significant heat under continuous load?

It operates at 1.1 V without a heat spreader, so airflow across the DIMM slots is needed for sustained operation.

Which SuperMicro systems accept this 288-pin DDR5 RDIMM?

It is validated for SuperMicro platforms that support DDR5 4800 registered ECC memory in a 4Rx4 configuration.

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