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Two green DDR5 RDIMM modules with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM 128GB (2x64GB) DDR5 4800 ECC RDIMM CL40 SuperMicro SYS-211SE-31D/31A X31SEED-F memory upgrade

SKU CH-NJ8P-28QXW

A 128 GB DDR5 ECC registered DIMM kit, two 64 GB modules at 4800 MT/s CL40 1.1 V, validated for SuperMicro SYS-211SE and X31SEED-F 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
  • 128GB total capacity across two 64GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered design protects data integrity under load
  • 10V operation reduces power draw per module
  • Validated for SuperMicro SYS-211SE and X31SEED-F systems

System-Specific DDR5 Upgrade

This NEMIX RAM kit delivers 128 GB of DDR5 4800 registered ECC memory in two 64 GB modules. It is built for SuperMicro IoT SuperServer platforms including the SYS-211SE-31D, SYS-211SE-31A and X31SEED-F motherboard. The modules run at 1.1 V with CL40 latency and use a 2Rx4 organisation.

Suited for SuperMicro server owners

This kit suits administrators expanding memory in the listed SuperMicro systems where registered ECC DDR5 is required. It is not for desktop PCs, consumer motherboards or laptops that accept only unbuffered non-ECC memory. Buyers needing a different capacity, speed or voltage should look at other system-specific kits.

Straightforward module installation

Installation follows the standard 288-pin RDIMM procedure: power down, open the chassis, align the notch and press each module until the retention clips engage. The most common issue is mixing registered ECC modules with unbuffered memory or populating slots in an order the motherboard manual does not support, which prevents the system from posting.

How it compares

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

Price $3,258.99
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 $25.46 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

What server model must I already own for this 288-pin DDR5 4800 RDIMM kit to be compatible?

The kit is validated for SuperMicro IoT SuperServer SYS-211SE-31D, SYS-211SE-31A and X31SEED-F motherboards.

Will the 1.1 V operating voltage of these 64 GB modules match the power delivery of my existing SuperMicro SYS-211SE platform?

Yes, 1.1 V is the standard DDR5 RDIMM voltage and the SYS-211SE platforms are designed for it.

How can I confirm the 128 GB kit is running at the rated 4800 MT/s with CL40 latency after installation?

Check the memory speed and timings in the BIOS/UEFI or use a tool such as dmidecode to verify DDR5 4800 and CL40 values.

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