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Two green DDR5 RDIMM sticks, black chips, no heat spreader, 288 pins, labelled NEMIX RAM

NEMIX RAM

NEMIX RAM DDR5 6400 ECC Registered RDIMM 256GB 2x128GB CL52 1.1V 4Rx4 memory upgrade

SKU CH-X58N-HPZ5K

256 GB DDR5 registered ECC server memory kit, two 128 GB modules at 6400 MHz CL52 1.1 V, validated for Supermicro X14SDV-42C-SP3F

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 256GB 2X128GB

  • 256GB total capacity in a 2x128GB kit for maximum server memory density
  • DDR5 6400 speed with CL52 latency delivers rated performance on supported platforms
  • Registered ECC architecture with 4Rx4 organisation offloads the controller and corrects single-bit errors
  • 1V operating voltage matches the motherboard's memory controller specification exactly
  • 288-pin RDIMM form factor verified for Supermicro X14SDV-42C-SP3F compatibility

Exact-match DDR5 server kit

This NEMIX RAM kit supplies 256 GB as two 128 GB DDR5-6400 RDIMMs built to the PC5-51200 standard. The modules are ECC registered with a 4Rx4 organisation and operate at 1.1 V CL52, matching the memory controller expectations of the Supermicro X14SDV-42C-SP3F motherboard.

Sustained-load behaviour

Registered buffering offloads the memory controller so every slot can remain fully populated at rated speed without timing regressions. ECC circuitry detects and corrects single-bit errors on the fly, preventing silent data corruption during long-running workloads.

Thermals and power

Each DIMM runs at the standard 1.1 V without a heat spreader, relying on chassis airflow for cooling. The low-voltage DDR5 design keeps power draw modest while the registered architecture reduces electrical loading on the motherboard.

How it compares

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

Price $9,397.99
Pricier than about 86% 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 $36.71 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 lineNEMIX RAM Original Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server Memory
Part numberMR51200-744K2
Total capacity256 GB (2 × 128 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 6400 (PC5 51200)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL52
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items256 GB 2 × 128 GB DDR5 6400 MHz PC5-51200 4Rx4 1.1 V 288-PIN ECC RDIMM KIT

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Questions about this item

How much power does each 128 GB DDR5-6400 RDIMM draw at its rated 1.1 V?

Each module operates at 1.1 V; the DDR5 standard defines the voltage but does not publish a per-DIMM wattage figure.

What motherboard slot and chipset must I already have for this 256 GB kit to work?

A Supermicro X14SDV-42C-SP3F motherboard with 288-pin DDR5 RDIMM slots is required.

Will these 4Rx4 registered ECC modules run in a system that currently uses 2Rx4 or 1Rx4 DDR5 RDIMMs?

The memory controller must support 4Rx4 population; mixing ranks is not guaranteed and the board manual should be consulted.

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