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

NEMIX RAM

NEMIX RAM 128GB 2x64GB DDR5 4800MHz ECC Registered RDIMM CL40 1.1V Supermicro H14DST-F memory upgrade

SKU CH-KFRG-Y8F2X

128 GB DDR5 registered ECC kit (2 × 64 GB) running at 4800 MHz CL40 1.1 V, validated for the Supermicro H14DST-F 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

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  • 128 GB total capacity from a matched 2 x 64 GB kit
  • DDR5 4800 speed (PC5-38400) runs at rated frequency
  • Registered ECC with CL40 latency prevents silent data corruption
  • 1 V operation and 2Rx4 ranks match server memory-controller specs
  • 288-pin RDIMM form factor verified for Supermicro H14DST-F motherboard

Exact-match DDR5 RDIMM kit for Supermicro H14DST-F

This 128GB kit contains two 64GB DDR5 4800MHz registered ECC modules built to the precise rank, voltage and timing the H14DST-F memory controller expects. It is intended for server administrators who need to populate every slot at full capacity without compatibility surprises. Buyers who require unbuffered UDIMMs or SODIMMs for workstations or laptops cannot use this product.

DDR5 4800 registered ECC limits and population rules

The modules run at 1.1V with CL40 latency and a 2Rx4 organisation, delivering PC5-38400 bandwidth only when the motherboard firmware supports that exact configuration. Registered buffering offloads the memory controller so all slots can run fully populated, while ECC corrects single-bit errors on the fly. Consult the H14DST-F manual for approved DIMM population order and maximum supported capacity per channel before installation.

Bare-module build with 288-pin RDIMM connectors

No heat spreader is fitted, so airflow across the PCB must be provided by the server chassis fans. The 288-pin registered edge connector seats only in DDR5 RDIMM slots keyed for registered modules; it will not fit UDIMM or SODIMM sockets. The two-module kit simplifies matched-pair installation for dual-channel or eight-channel architectures that demand identical rank and timing.

How it compares

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

Price $3,052.99
Pricier than about 73% 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 $23.85 per GB
Pricier than about 69% 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

Should I pick the 128GB 2x64GB kit or look for a different capacity for my Supermicro H14DST-F?

The 128GB kit (2 x 64GB) is the exact-match upgrade for the Supermicro H14DST-F motherboard. Each 64GB module is 2Rx4 Registered ECC DDR5-4800 at 1.1V CL40, matching the board's memory-population rules for full-capacity recognition.

What does the DDR5-4800 rating mean once the modules are installed in the server?

DDR5-4800 (PC5-38400) is the rated data rate. In the H14DST-F the modules will run at 4800 MT/s with CL40 latency at 1.1V, delivering the bandwidth and timing the memory controller expects when all slots are populated.

Is this a 288-pin RDIMM and does the registered buffer limit how many modules I can install?

Yes, these are 288-pin DDR5 RDIMMs. The registered (buffered) architecture offloads the memory controller, allowing every supported slot on the H14DST-F to run fully populated at the full 128GB kit capacity without signal-integrity limits.

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