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Two green DDR5 RDIMM modules without heat spreaders, 256GB kit

NEMIX RAM

NEMIX RAM DDR5 4800 256GB (2x128GB) CL40 2Rx4 ECC Registered RDIMM Supermicro H14SSF memory upgrade

SKU CH-2TYJ-1TBC4

256 GB kit of two 128 GB DDR5-4800 ECC registered RDIMMs at 1.1 V CL40 for Supermicro H14SSF servers

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 256GB 2X128GB

Show 24 more
  • 256GB total capacity from two 128GB modules for maximum server memory density
  • DDR5 4800 speed with CL40 latency delivers rated throughput for Supermicro H14SSF
  • Registered ECC architecture offloads the memory controller and corrects single-bit errors automatically
  • 1V operation matches the board's voltage requirement for stable full-population performance
  • 288-pin RDIMM form factor fits the exact slot type the motherboard requires

Capacity and Fit

This 256GB kit (2 x 128GB) provides DDR5-4800 registered ECC memory built specifically for the Supermicro H14SSF motherboard. The 288-pin RDIMM modules match the board’s required form factor, voltage, rank and timing so the system recognises the full capacity at rated speed.

Upgrade Scope

It replaces lower-capacity DDR5 RDIMM kits or fills empty slots when the platform’s memory population rules allow full 256GB operation. The jump is worthwhile when your workloads need the maximum registered ECC capacity this board supports and you have verified the approved DIMM sequence in the manual.

Pre-Install Checks

Confirm the H14SSF firmware revision and the motherboard manual’s qualified vendor list before ordering. Verify the exact slot population order, maximum supported capacity per channel and any BIOS settings required for 2Rx4 registered modules. Ensure the chassis has clearance for standard-height RDIMMs.

How it compares

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

Price $7,389.99
Pricier than about 83% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $28.87 per GB
Pricier than about 82% 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 numberMR38400-724K2
Total capacity256 GB (2 × 128 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 items256 GB 2 × 128 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 288-pin RDIMM form factor match the Supermicro H14SSF motherboard slots?

Yes, this kit uses the 288-pin Registered RDIMM form factor that the Supermicro H14SSF requires; it is not a UDIMM or SODIMM and will seat in the board's DDR5 DIMM slots.

What is the correct population order when installing both 128GB modules in the H14SSF?

Consult the Supermicro H14SSF manual for the approved DIMM population sequence; the board's memory-controller rules dictate which slots must be filled first for dual-rank 2Rx4 modules.

Will the 1.1V DDR5 modules need any firmware updates or battery-backed settings to maintain ECC operation over time?

No firmware or battery maintenance is required for ECC; the registered architecture and on-die ECC function continuously at 1.1V, and the modules carry a lifetime replacement warranty if a hardware fault ever occurs.

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