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Single green DDR5 RDIMM module, 288 pins, no heat spreader, 128GB capacity

NEMIX RAM

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

SKU CH-3A3Q-W5D81

128GB DDR5 4800 ECC registered RDIMM with CL40 latency for SuperMicro servers

  • 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
  • DDR5 4800 speed delivers high data throughput
  • ECC registered design protects data integrity
  • 1 V operation reduces power draw
  • Qualified for Supermicro UP SuperServer SYS-111C-NR SYS-521C-NR X13SEDW-F

128GB DDR5 ECC RDIMM for Supermicro

This 128GB DDR5 4800 registered DIMM is built for Supermicro UP SuperServer SYS-111C-NR and SYS-521C-NR platforms. It targets IT professionals who need ECC integrity and registered signal buffering for mission-critical server workloads. The single-module design populates one 288-pin slot with a 4Rx4 organisation.

Sustained load behaviour with 4Rx4 organisation

The 4Rx4 rank layout spreads memory access across four ranks, helping the memory controller maintain throughput during extended compute tasks. ECC circuitry corrects single-bit errors on the fly, preventing data corruption during long-running jobs. Registered buffering reduces electrical load on the motherboard, supporting stability when all channels are populated.

Installation notes and common issues

The module installs in a standard 288-pin DDR5 slot and operates at 1.1V without a heat spreader. Compatibility is validated for the X13SEDW-F motherboard and the two SuperServer models listed; other boards may require a BIOS update or may not support 128GB single-rank density. Always consult the system manual for population rules and maximum capacity per channel.

How it compares

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

Price $3,753.99
Pricier than about 76% 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 $29.33 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 much power does this 1.10V DDR5 4800 module draw when running continuously in a server?

The module operates at 1.10V DDR5 standard voltage; actual power draw depends on workload and the Supermicro platform's memory controller.

What motherboard and CPU combination must I already have for this 288-pin ECC RDIMM to function?

It requires a Supermicro motherboard such as the X13SEDW-F or a compatible UP SuperServer SYS-111C-NR or SYS-521C-NR with a CPU that supports DDR5 4800 registered ECC memory.

Can I mix this 4Rx4 128GB stick with smaller DDR5 ECC RDIMMs already installed in my Supermicro system?

Mixing ranks and capacities is platform-dependent; Supermicro's memory population rules for the X13SEDW-F and listed servers dictate which combinations are supported.

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