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Green printed circuit board with gold edge connectors and black memory chips in a single 288-pin DDR5 RDIMM module

NEMIX RAM

NEMIX RAM 128GB DDR5 4800 ECC RDIMM CL40 1.1V 4Rx4 memory upgrade

SKU CH-CQ99-TF4QB

128GB DDR5 4800 ECC RDIMM CL40 1.1V 4Rx4 module for SuperMicro GPU SuperServers

  • Total capacity128 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128 GB capacity expands server memory headroom for large datasets
  • DDR5 4800 speed delivers high bandwidth for demanding workloads
  • ECC registered design protects data integrity in mission-critical systems
  • 10 V operation reduces power draw per module
  • Validated for Supermicro SYS-821GE-TNHR, SYS-821GV-TNR and SYS-421GE-TNRT

128GB DDR5 ECC RDIMM for Supermicro Servers

This 128GB DDR5 4800 registered DIMM is built for Supermicro GPU SuperServer and workstation platforms. It delivers error-correcting code memory in a single module for high-density server configurations.

Installation requires matching registered DIMM

The 288-pin DDR5 RDIMM installs like standard server memory but must be used in systems that accept 4Rx4 registered modules at 1.1V. Mixing with unbuffered or non-ECC DIMMs will prevent boot.

Suited for IT teams expanding Supermicro 821

Buyers needing non-ECC memory, desktop DDR5, or lower-capacity modules for consumer motherboards should look elsewhere. This module targets registered ECC server platforms only.

How it compares

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

Price $3,733.99
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 $29.17 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 can I verify the module runs at 4800 MT/s with CL40 after installation?

Enter the system BIOS or UEFI and confirm the memory frequency reads 4800 and the CAS latency shows 40.

What is included in the package and do I need extra parts?

The box contains one 128 GB 288-pin DDR5 RDIMM; no additional components are required for installation.

Which capacity and rank configuration matches the SuperMicro SYS-821GE-TNHR?

Choose the single 128 GB 4Rx4 module (part MR38400-744K1) listed for that server model.

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