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Two green DDR5 RDIMM modules, no heat spreader, gold edge connectors

NEMIX RAM

NEMIX RAM 128GB (2x64GB) DDR5 4800 ECC RDIMM CL40 1.1V 2Rx4 SuperMicro Compatible memory upgrade

SKU CH-XJ2A-XRVAW

A 128 GB DDR5 ECC registered dual-rank kit running at 4800 MT/s with CL40 latency, validated for SuperMicro UP SuperServer systems

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128 GB capacity supports heavy workloads
  • DDR5 4800 speed delivers high bandwidth
  • ECC registered design protects data integrity
  • 2Rx4 organisation maximises density per module
  • 1 V operation reduces power consumption

128GB DDR5 ECC RDIMM Kit

This NEMIX RAM kit provides 128GB of DDR5 4800 registered ECC memory across two 64GB modules. It is built for SuperMicro UP SuperServer SYS-111C-NR and SYS-521C-NR systems using the X13SEDW-F motherboard. The modules operate at 1.1V with CL40 latency and a 2Rx4 rank configuration.

Upgrade From Lower Capacity DDR5

The kit replaces smaller DDR5 RDIMM sets when workloads demand more than 64GB of registered ECC memory. The jump is worth it for virtualisation hosts, database servers or compute nodes that hit capacity limits on the X13SEDW-F platform. It does not serve buyers who need non-ECC UDIMMs or speeds above 4800MT/s.

Straightforward DIMM Installation

Installation follows standard 288-pin DDR5 RDIMM procedure on the target SuperMicro motherboards. Common issues include mixing registered and unbuffered modules or populating slots in an order the board firmware does not support. Always consult the X13SEDW-F manual for the approved population sequence before fitting the pair.

How it compares

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

Price $3,252.99
Pricier than about 74% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (2 × 64 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $25.41 per GB
Pricier than about 70% 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 numberMR38400-924K2
Total capacity128 GB (2 × 64 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 rank2Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items128 GB (2 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Will the 288-pin DDR5 RDIMM modules fit my SuperMicro UP SuperServer SYS-111C-NR or SYS-521C-NR?

Yes, this 128GB kit (2x64GB) is built to the 288-pin DDR5 RDIMM form factor and is validated for the SuperMicro UP SuperServer SYS-111C-NR and SYS-521C-NR platforms.

What is the correct slot population order when installing both 64GB modules on the X13SEDW-F motherboard?

Install the first module in the slot designated as DIMM_A1 and the second in DIMM_B1 per the X13SEDW-F manual; populating the primary channel first avoids a no-post condition.

When should I expect to replace the Samsung, Micron or Hynix DRAM chips on these registered ECC modules?

The modules carry a lifetime replacement warranty; replacement is only required if a module fails memtest or the server logs correctable ECC errors that exceed the platform threshold.

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