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Two green DDR5 RDIMM modules, black chips, no heat spreader

NEMIX RAM

NEMIX RAM DDR5 4800 ECC Registered RDIMM 128GB (2 x 64GB) Supermicro H14SST-G memory upgrade

SKU CH-C5WS-R1Q7H

A 128GB DDR5 4800 ECC Registered RDIMM kit (2 x 64GB, CL40, 1.1V, 2Rx4) validated for the Supermicro H14SST-G motherboard

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 128GB 2X64GB

Show 30 more
  • Exact DDR5-4800 128GB kit matches Supermicro H14SST-G memory controller specs
  • Registered ECC RDIMM design keeps every slot stable at full population
  • 2Rx4 organisation at 1.1V delivers rated speed without tuning
  • Major-brand Samsung Micron Hynix chips ensure enterprise-grade reliability
  • Lifetime replacement warranty plus free US-based technical support included

Supermicro H14SST-G DDR5 ECC RDIMM kit

This 128 GB kit contains two 64 GB DDR5 4800 registered ECC RDIMMs built for the Supermicro H14SST-G motherboard. The modules run at 1.1 V with CL40 latency and a 2Rx4 rank layout that matches the board's memory controller expectations. Server administrators and integrators upgrading this specific platform receive the exact capacity and signalling the firmware recognises at full speed.

Check motherboard manual for population rules

Verify the H14SST-G manual for approved DIMM population order, maximum supported capacity per slot, and any BIOS version requirements before installation. The board requires 288-pin registered RDIMMs; unbuffered UDIMMs or SODIMMs will not function. Confirm that your chassis provides adequate airflow for fully populated memory channels.

Replaces lower-capacity or slower DDR5 RDIMMs

The jump is worth it when workloads need the full 128 GB at the native 4800 MT/s data rate with registered buffering and ECC protection. Systems running with smaller modules or mixed ranks that force down-clocking gain capacity and stability in a single matched kit. Buyers who need a different form factor, non-ECC memory, or a speed grade not supported by this motherboard should look elsewhere.

How it compares

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

Price $3,553.99
Pricier than about 75% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (2 × 64 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $27.77 per GB
Pricier than about 78% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineNEMIX RAM Original Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server Memory
Part numberMR38400-924K2
Total capacity128 GB (2 × 64 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
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items128 GB 2 × 64 GB DDR5 4800 MHz PC5-38400 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Other versions of this model

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Questions about this item

Does the kit include both 64 GB modules or must I purchase a second stick separately?

The package contains two 64 GB RDIMMs for a total of 128 GB, so no additional modules are required.

My board has eight DDR5 slots — should I populate all slots with this 2Rx4 kit or use a different rank configuration?

This 2Rx4 registered ECC kit is the exact rank and voltage the H14SST-G expects; follow the motherboard manual for the approved population order when filling all slots.

Will the DDR5-4800 CL40 rating run at that speed on the Supermicro H14SST-G without manual BIOS tuning?

Yes, the modules are spec-matched to the board's memory controller, so they are recognised at full capacity and operate at the rated 4800 MT/s CL40 automatically.

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