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Green 288-pin DDR5 RDIMM module, 128GB, no heat spreader

NEMIX RAM

NEMIX RAM 128GB DDR5 4800 CL40 4Rx4 1.1V ECC RDIMM SuperMicro X13SEI-F X13SEI-TF memory upgrade

SKU CH-WD68-KCVWY

A 128 GB DDR5 4800 CL40 4Rx4 ECC registered DIMM built for SuperMicro X13SEI-F and X13SEI-TF 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 for heavy workloads
  • DDR5 4800 speed delivers high bandwidth for data-intensive applications
  • ECC registered design protects data integrity in mission-critical environments
  • 1 V operation reduces power draw per module
  • Validated for SuperMicro X13SEI-F and X13SEI-TF motherboards

SuperMicro X13SEI Server Memory

This 128GB DDR5 module is built for SuperMicro X13SEI-F and X13SEI-TF motherboards. It targets IT professionals upgrading registered ECC capacity in mission-critical servers and workstations. The single-stick design fills one 288-pin slot with high-density registered memory.

DDR5 4800 Registered ECC Limits

The module runs at 4800 MT/s with CL40 latency at 1.10V. Registered buffering and 4Rx4 organisation add command-address overhead that constrains maximum usable frequency on multi-DIMM channels. ECC correction protects data integrity but consumes bandwidth for parity operations.

128GB 4Rx4 Density Decides Fit

The 4Rx4 rank structure delivers 128GB in a single rank-heavy package. Motherboard memory-controller limits on rank count per channel determine whether this module can be installed alongside others. Buyers needing lower rank counts or non-ECC operation must choose a different specification.

How it compares

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

Price $4,209.99
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 $32.89 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

Should I pick the 128GB single module or look for smaller kits to reach the same total?

This listing is a single 128GB DDR5 4800 RDIMM, so one module gives the full capacity.

What does the 4800 speed rating actually deliver in a SuperMicro X13SEI-F or X13SEI-TF server?

The module runs at DDR5 4800 (PC5-38400) with CL40 latency, providing the rated bandwidth when the platform operates at that speed.

How does the 288-pin DDR5 RDIMM interface and registered design affect compatibility with these boards?

The 288-pin DDR5 RDIMM is the standard form factor for these SuperMicro motherboards, and the registered buffer works with the server chipset.

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