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Two green DDR5 RDIMM modules, 288-pin, no heat spreader, 256GB kit

NEMIX RAM

NEMIX RAM DDR5 256GB (2x128GB) 4800MHz ECC RDIMM 2Rx4 CL40 1.1V Supermicro H14DSG-O-CPU

SKU CH-4M0C-Q3V0P

256GB DDR5 ECC registered RDIMM kit (2x128GB) at 4800MHz CL40 1.1V, verified for Supermicro H14DSG-O-CPU

  • 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 30 more
  • 256 GB total capacity from two 128 GB modules for dense server workloads
  • DDR5 4800 speed delivers PC5-38400 bandwidth for high-throughput applications
  • Registered ECC design corrects single-bit errors and stabilises fully populated channels
  • CL40 latency at 1.1 V balances responsiveness with enterprise power efficiency
  • Verified fit for Supermicro H14DSG-O-CPU using 288-pin RDIMM form factor

Exact-match DDR5 RDIMM kit

This NEMIX RAM kit delivers 256GB (2 x 128GB) of DDR5-4800 ECC Registered memory built to the precise rank, voltage and timing the Supermicro H14DSG-O-CPU memory controller expects. The 2Rx4 organization and CL40 latency let the board recognize full capacity at rated speed without manual tuning.

288-pin Registered form factor

The modules use the 288-pin RDIMM form factor this motherboard requires, not UDIMM or SODIMM. Registered architecture offloads the memory controller so every populated slot runs at full capacity while ECC corrects single-bit errors on the fly to prevent silent data corruption.

1.10V operation without heat spreaders

Running at 1.10V keeps power draw low in dense server configurations where multiple kits fill every channel. The modules ship without heat spreaders, relying on chassis airflow to maintain stable temperatures under sustained enterprise workloads.

How it compares

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

Price $7,745.99
Pricier than about 84% 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 $30.26 per GB
Pricier than about 86% 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

Will the 1.1V DDR5 4800MHz CL40 modules throttle or error out during 24/7 server workloads?

The RDIMM registered buffer offloads the memory controller so every slot runs fully populated at rated speed while ECC corrects single-bit errors on the fly, preventing silent corruption during sustained use.

How much heat and power will the 2x128GB kit add to a fully loaded Supermicro H14DSG-O-CPU chassis?

Each module operates at 1.1V without a heat spreader; registered buffering reduces electrical load on the CPU memory controller, keeping thermals and draw low enough for standard server airflow.

Does the Supermicro H14DSG-O-CPU motherboard need a specific BIOS version or CPU stepping to recognise the 256GB 2Rx4 kit?

The kit is spec-matched to the board's 288-pin RDIMM slots and population rules; consult the motherboard manual for supported capacities, approved DIMM order, and any required firmware updates before installation.

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