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Single green DDR5 RDIMM module with black chips, no heat spreader, 288-pin edge connector

NEMIX RAM

NEMIX RAM CSE-735D4-1K26B 128GB DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-S8AZ-VYS8V MPN CSE-735D4-1K26B

128 GB DDR5 4800 ECC registered RDIMM for Supermicro SuperWorkstation SYS-531A-I

  • Total capacity128 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128 GB capacity handles large server workloads
  • DDR5 4800 speed delivers high data throughput
  • CL40 latency supports responsive memory access
  • ECC registered design protects data integrity
  • 1 V operation reduces power consumption

128 GB DDR5 4800 ECC RDIMM

This 128 GB DDR5 4800 module provides registered ECC memory for Supermicro servers and workstations. It targets administrators expanding capacity in the SYS-531A-I or X13SRA-TF platforms where data integrity is mandatory. The single-stick design fills one 288-pin slot and runs at 1.10 V.

Registered 4Rx4 build with major OEM chips

The module uses a 4Rx4 organisation built from Samsung, Micron or Hynix components without a heat spreader. Registered buffering reduces electrical load on the memory controller, allowing dense population in multi-socket boards. Standard 288-pin DDR5 keying ensures correct orientation during installation.

Upgrade path for compatible Supermicro systems

This part replaces lower-capacity DDR5 RDIMMs or adds new capacity to empty slots in qualified Supermicro SuperWorkstation models. The jump is worthwhile when workloads demand 128 GB per DIMM and the platform memory controller supports 4Rx4 registered modules at 4800 MT/s.

How it compares

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

Price $3,870.99
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 $30.24 per GB
Pricier than about 86% 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

What DDR5 speed and data-rate does this 128GB RDIMM run at?

It operates at DDR5 4800 MT/s, labelled PC5-38400, with CAS latency CL40 at 1.1 V.

Which motherboard slot and form-factor must the system provide for this module?

A 288-pin DDR5 RDIMM socket; the stick is a single 128 GB 4Rx4 registered DIMM with no heat spreader.

How is the module seated, and what step do builders often miss?

Align the key notch with the slot, press firmly until both retention clips click, then verify in BIOS that the channel shows 4800 MT/s and ECC active.

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