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Green rectangular DDR5 RDIMM module with black chips, no heat spreader, 288 gold pins along bottom edge

NEMIX RAM

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

SKU CH-DYPZ-WRD3D

A 128 GB DDR5 4800 RDIMM module with ECC and registered buffering for Supermicro CloudDC SuperServer systems

  • Total capacity128 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128GB DDR5 capacity scales server workloads
  • 4800MHz speed with CL40 latency processes data efficiently
  • 1V operation reduces power draw per module
  • ECC registered design protects data integrity under load
  • Validated for SuperMicro CloudDC SYS-621C-TN12R SYS-611C-TN4R SYS-121C-TN2R

128 GB DDR5 RDIMM for Supermicro servers

This NEMIX RAM module delivers 128 GB of DDR5 4800 memory in a single 288-pin registered DIMM. It operates at 1.1 V with CL40 latency and includes ECC and 4Rx4 organisation for data-integrity workloads. The part is validated for Supermicro CloudDC SuperServer platforms including the SYS-621C-TN12R, SYS-611C-TN4R and SYS-121C-TN2R.

Upgrade path from lower-capacity DDR5 RDIMMs

Replacing smaller registered modules with this 128 GB stick increases total memory without consuming additional slots. The jump is worthwhile when applications demand larger in-memory datasets or higher virtual-machine density and the platform supports 4Rx4 registered DIMMs at 4800 MT/s.

Suited for IT teams expanding Supermicro CloudDC

Administrators scaling memory in the listed SuperServer models can add this module directly. Builders needing unbuffered UDIMMs, non-ECC memory, speeds above 4800 MT/s or capacities beyond a single 128 GB DIMM should evaluate other options.

How it compares

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

Price $4,245.99
Pricier than about 77% 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 $33.17 per GB
Pricier than about 90% 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

Does the 288-pin DDR5 RDIMM fit the SuperMicro CloudDC SuperServer SYS-621C-TN12R memory slots?

Yes, this module is built to the DDR5 RDIMM form factor and matches the pinout and keying used by the SYS-621C-TN12R memory slots.

What is the correct way to seat the 1Rx4 registered DIMM so the ECC register initialises?

Align the notch with the slot key, press straight down until both retention clips click, then verify in BIOS that the module reports 4800 MT/s and ECC active.

When should the 128 GB module be replaced based on ECC health monitoring?

Replace the module if the system logs show increasing correctable ECC error counts or if a firmware update changes the supported memory configuration.

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