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

NEMIX RAM

NEMIX RAM 128GB 2x64GB DDR5 6400 CL52 4Rx4 ECC RDIMM Supermicro X14SDV-32C-SP3F memory upgrade

SKU CH-FQQ1-881PK

128 GB DDR5 registered ECC server memory kit, two 64 GB modules at 6400 MT/s CL52 1.1 V 4Rx4, validated for the Supermicro X14SDV-32C-SP3F 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 total capacity with two 64 GB modules for full memory population
  • DDR5 6400 speed delivers 51200 MT/s bandwidth for high-throughput workloads
  • Registered ECC architecture corrects single-bit errors to prevent data corruption
  • 4Rx4 quad-rank design matches the motherboard's memory-controller expectations exactly
  • 1 V operation at CL52 latency meets the platform's voltage and timing requirements

Compatible DDR5 128GB RDIMM kit

This 128GB kit contains two 64GB DDR5 6400 CL52 4Rx4 ECC Registered RDIMMs built for the Supermicro X14SDV-32C-SP3F motherboard. It targets server administrators who need exact-match capacity and registered stability for production workloads.

Verify board population rules

Confirm the motherboard manual for supported capacities, approved DIMM population order, and installation steps before ordering. The board requires 288-pin Registered RDIMMs, not UDIMMs or SODIMMs, and population rules determine whether both modules run at rated speed.

Replaces smaller or slower DDR5 RDIMMs

The upgrade is worth it when current modules limit total capacity or force lower data rates, and the manual confirms dual 64GB 4Rx4 Registered ECC DIMMs at DDR5 6400 with CL52 timing at 1.1V.

How it compares

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

Price $4,592.99
Pricier than about 79% 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 $35.88 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 numberMR51200-944K2
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

What comes in the 128GB kit and do I need anything else to install it?

The kit contains two 64GB DDR5 6400 RDIMM modules. No extra parts are required; they fit the 288-pin slots on the Supermicro X14SDV-32C-SP3F motherboard.

Why choose the 4Rx4 128GB kit instead of a lower-rank option?

The 4Rx4 organization matches the memory controller expectations of the Supermicro X14SDV-32C-SP3F, allowing full-capacity recognition and rated DDR5 6400 operation.

What does the CL52 6400 rating mean once the modules are running in the server?

CL52 is the CAS latency at DDR5 6400 speed; the registered ECC design keeps all slots stable at that timing while correcting single-bit errors during operation.

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