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Green DDR5 server memory module, 288 pins, no heat spreader, 128GB label

NEMIX RAM

NEMIX RAM 128GB DDR5 4800 ECC RDIMM 4Rx4 CL40 288-Pin 1.1V SuperMicro Compatible

SKU CH-55X9-C1JK4

A 128GB DDR5 4800 registered ECC RDIMM with CL40 latency and 1.1V operation, built for SuperMicro server platforms

  • Total capacity128 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128GB capacity supports large server workloads
  • DDR5 4800 speed delivers high data throughput
  • ECC registered design protects data integrity
  • 1V operation reduces power consumption
  • Validated for SuperMicro FatTwin and SuperServer systems

Capacity and Compatibility

This 128GB DDR5 RDIMM module delivers registered ECC memory for Supermicro server platforms. The single-stick design suits administrators who need maximum density per slot in FatTwin or SuperServer systems. Buyers requiring non-ECC or unbuffered memory for consumer motherboards cannot use this module.

Thermals and Power

Operating at 1.10V, the module runs without a heat spreader and draws minimal power during typical server workloads. Registered buffering reduces electrical load on the memory controller, contributing to stable thermals in densely populated chassis. Acoustic impact is negligible as the module has no active cooling.

Sustained Load Behaviour

CL40 latency and 4Rx4 organisation support consistent throughput during extended compute tasks such as virtualisation or database processing. ECC protection corrects single-bit errors in real time, maintaining data integrity over long runs. Systems needing higher frequencies or lower latencies for burst-oriented workloads will not achieve those targets with this specification.

How it compares

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

Price $3,735.99
Pricier than about 75% 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 $29.19 per GB
Pricier than about 83% 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

How do I install the 288-pin DDR5 RDIMM and which step is often missed?

Align the notch on the module with the slot key, press firmly until both side clips click, then verify the system recognises the full 128GB capacity in BIOS — skipping the clip check is the common error.

What maintenance or replacement will the 1.1V ECC registered module need over time?

The module has no heat spreader and no moving parts; keep server airflow clean and re-seat the RDIMM only if ECC logs report correctable errors after years of continuous operation.

At what point does the CL40 4Rx4 configuration hit its limit during sustained workloads?

The registered buffer and 4Rx4 organisation maintain stability up to the rated 4800 MT/s; the first limit encountered is the memory-controller bandwidth ceiling of the SuperMicro platform.

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