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Two green DDR5 RDIMM modules with black chips and gold contacts

NEMIX RAM

NEMIX RAM DDR5 6400 128GB 2x64GB CL52 1.1V 4Rx4 ECC RDIMM Supermicro X14SDW-36CE-SP9F memory upgrade

SKU CH-JAF0-HY7B3

128 GB DDR5 6400 ECC registered RDIMM kit (2 × 64 GB, CL52, 1.1 V, 4Rx4) validated for the Supermicro X14SDW-36CE-SP9F motherboard

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 128GB 2X64GB

  • 128 GB capacity with 2 × 64 GB modules for full server memory population
  • DDR5 6400 speed rated at PC5-51200 for high-throughput workloads
  • Registered ECC architecture with 4Rx4 organisation corrects single-bit errors on the fly
  • 10 V operation matches the motherboard's voltage requirement exactly
  • 288-pin RDIMM form factor fits the Supermicro X14SDW-36CE-SP9F memory slots

Exact-match DDR5 upgrade for Supermicro X14SDW

This 128 GB kit contains two 64 GB DDR5-6400 registered ECC RDIMMs built to the precise rank, voltage and timing the X14SDW-36CE-SP9F memory controller expects. The modules are recognised at full capacity and run at their rated 6400 MT/s speed without manual tuning.

Thermals and power at rated load

Operating at 1.1 V, the dual-rank 4Rx4 modules draw minimal power for their density and produce low heat even when all slots are populated. No heat spreaders are fitted, so airflow through the server chassis handles cooling silently under normal workloads.

Build and daily implications

The 288-pin RDIMM form factor matches the board's registered-DIMM slots exactly; UDIMM or SODIMM alternatives will not fit. Registered buffering offloads the memory controller so every slot runs fully populated, while on-die ECC corrects single-bit errors before they reach production data. Buyers needing unbuffered DIMMs or lower capacities should verify their platform requirements first.

How it compares

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

Price $4,301.99
Pricier than about 78% 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 $33.61 per GB
Pricier than about 90% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameNEMIX RAM
Product lineNEMIX RAM Original Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server Memory
Part numberMR51200-944K2
Total capacity128 GB (2 × 64 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 items128 GB 2 × 64 GB DDR5 6400 MHz PC5-51200 4Rx4 1.1 V 288-PIN ECC RDIMM KIT

Other versions of this model

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Questions about this item

How do I install the 288-pin DDR5 RDIMM modules in the Supermicro X14SDW-36CE-SP9F, and what step is commonly missed?

Power down the server and open the chassis. Align the notch on each 288-pin RDIMM with the slot key, press firmly until the ejector tabs click, then follow the board manual's exact population order for 4Rx4 modules.

What maintenance or replacement will the 128GB DDR5 6400 ECC RDIMM kit need over time?

No scheduled maintenance is required. ECC corrects single-bit errors automatically. If a module fails, the lifetime replacement warranty covers a swap; otherwise the kit runs for the server's service life.

What limit appears first when the 4Rx4 DDR5 6400 kit runs sustained workloads on the X14SDW-36CE-SP9F?

The memory controller's maximum supported rank-per-channel limit is reached first. With 4Rx4 modules, full population hits that ceiling before thermal or voltage thresholds become a factor.

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