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Two green DDR5 RDIMM modules, bare chips, no heat spreader

NEMIX RAM

NEMIX RAM 128GB (2x64GB) DDR5 4800 CL40 ECC RDIMM SuperMicro 211SE memory upgrade

SKU CH-EAV9-8BSJP

128 GB DDR5-4800 ECC registered dual-rank kit validated for SuperMicro 211SE servers

  • 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 with two 64 GB modules for high-density server workloads
  • DDR5 4800 speed at PC5-38400 bandwidth for fast data throughput
  • ECC registered RDIMM design with CL40 latency for error-corrected stability
  • 1 V operating voltage reduces power draw in dense configurations
  • Validated for SuperMicro 211SE series including SYS-211SE-31DS and X31SEED-SF

NEMIX RAM 128GB DDR5 4800 ECC RDIMM Kit

This NEMIX RAM kit provides 128GB of DDR5 server memory as two 64GB modules. It runs at 4800MT/s with CL40 latency and operates at 1.10V. The registered ECC design targets SuperMicro IoT SuperServer SYS-211SE platforms and the X31SEED-SF motherboard.

Suited for registered DDR5 slots.

These modules fit systems that require 288-pin registered DDR5 RDIMMs with ECC. They will not work in desktop motherboards or laptops that only accept unbuffered UDIMMs. Buyers needing non-ECC memory or higher speeds should look elsewhere.

Registered ECC RDIMM with 2Rx4 organisation

The kit uses a 2Rx4 rank configuration on major OEM chips from Samsung, Micron or Hynix. This organisation and the registered buffer are the decisive compatibility factors for the supported SuperMicro 211SE servers.

How it compares

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

Price $3,394.99
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 $26.52 per GB
Pricier than about 73% 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

How do I install the 288-pin DDR5 RDIMM modules in my SuperMicro 211SE server, and what step is often missed?

Power down, open the chassis, align each 64GB module's key notch with the DDR5 slot, press firmly until the retention clips click, then verify in BIOS that both 64GB sticks register at 4800 MT/s with ECC active; the step often missed is seating both modules fully so the clips engage on both sides.

What maintenance or replacement will the ECC RDIMM kit need over its service life?

No scheduled maintenance is required; the modules run at 1.10 V without heat spreaders, so keep server airflow clean, and replace only if a module fails — ECC corrects single-bit errors on the fly, but a persistent multi-bit fault means swapping the affected 64GB stick.

What limit appears first when the 128GB kit runs sustained workloads at 4800 MT/s CL40?

The CAS latency of CL40 sets the timing floor, so under continuous load the memory controller hits latency-bound throughput before thermal or voltage limits, because the 1.10 V registered DDR5 modules operate within spec without throttling.

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