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Green rectangular DDR5 memory module with gold edge connectors and black chips, no heat spreader

NEMIX RAM

NEMIX RAM 128GB DDR5 4800 ECC RDIMM 4Rx4 CL40 1.1V 288-pin SuperMicro Server Memory Upgrade

SKU CH-CVRF-747VD

Adds 128GB of DDR5 4800 ECC registered memory in a single 288-pin RDIMM validated for SuperMicro Hyper SuperServer systems

  • Capacity128GB
  • SpeedDDR5 4800 (PC5 38400)
  • ECCYes
  • Buffered/RegisteredRegistered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.10V
  • 128 GB capacity supports heavy virtualization workloads
  • DDR5 4800 MT/s bandwidth feeds multi-core CPUs efficiently
  • ECC registered design corrects errors for uptime
  • 1 V operation lowers server power draw
  • Qualified for SuperMicro Hyper SuperServer platforms

128GB DDR5 4800 ECC RDIMM

This 128GB DDR5 4800 registered DIMM targets Supermicro Hyper SuperServer platforms including the SYS-121H-TNR and SYS-221H-TNR families. It provides ECC protection and registered signalling for multi-socket server boards that demand data integrity under sustained load. Builders needing non-ECC or unbuffered memory for consumer platforms cannot use this module.

288-pin registered layout with major OEM chips

The module uses a 288-pin DDR5 RDIMM form factor without a heat spreader, relying on chassis airflow for thermal management. Major OEM Samsung, Micron or Hynix DRAM chips are selected per production run. The registered buffer and 4Rx4 organisation increase electrical loading on the memory controller, so the board must support registered ECC DIMMs at this density.

CL40 latency at 1.10V operating voltage

Rated at DDR5 4800 (PC5-38400) with a CAS latency of 40 cycles, the module runs at the standard 1.10V DDR5 voltage. This timing and voltage combination determines whether the system memory controller can train the link at full speed; boards limited to lower data rates or different voltage rails will not achieve the rated specification.

Highlights

  • 128 GB capacity supports heavy virtualization workloads
  • DDR5 4800 MT/s bandwidth feeds multi-core CPUs efficiently
  • ECC registered design corrects errors for uptime
  • 1 V operation lowers server power draw
  • Qualified for SuperMicro Hyper SuperServer platforms

Specifications

BrandNEMIX RAM
SeriesSuperMicro Server/Workstation Compatible Series Memory
ModelSuperMicro DDR5 4800MHZ ECC RDIMM Registered Server Memory
Part NumberMR38400-744K1
Capacity128GB
SpeedDDR5 4800 (PC5 38400)
ECCYes
Buffered/RegisteredRegistered
ChipsetMajor OEM Samsung, Micron, Hynix
Voltage1.10V
Compatible SystemSupermicro
CAS LatencyCL40
Heat SpreaderNo
Type288-Pin DDR5 RDIMM
Rank4Rx4
FeaturesDDR5 ECC Registered RDIMM Server Motherboard Compatible
Package Content128GB (1X128GB) DDR5 4800MHZ PC5-38400 4Rx4 1.1V CL40 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

Does DDR5 4800 PC5-38400 set the peak transfer rate at 38400 MT/s?

Yes, the module runs at DDR5 4800 which is designated PC5-38400, so the peak data rate is 38400 MT/s.

What slot type and keying does the 288-pin RDIMM need on a SuperMicro motherboard?

It requires a standard 288-pin DDR5 RDIMM slot; the single notch position matches the DDR5 server keying used on SuperMicro Hyper SuperServer boards.

Which population order should I follow when adding this 4Rx4 128GB stick to a SuperMicro SYS-121H-TNR?

Install the module in the first slot of the lowest-numbered channel for that CPU socket, as shown in the SuperMicro manual, to ensure the 4Rx4 rank is recognised at 4800 MT/s.

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