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Two green DDR5 RDIMM modules in a clear blister pack

NEMIX RAM

NEMIX RAM DDR5 6400 ECC RDIMM 128GB (2x64GB) CL52 1.1V 4Rx4 memory upgrade

SKU CH-3KWM-9N1PP

128 GB DDR5-6400 ECC registered server memory kit, CL52 1.1 V 4Rx4, validated for Supermicro X14SDW-42C-SP9F

  • 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

  • Full-speed operation at rated DDR5 6400 CL52 with 1.1 V timing
  • 128 GB total capacity from two 64 GB registered ECC modules
  • 4Rx4 registered design keeps every slot stable at full population
  • Verified fit for Supermicro X14SDW-42C-SP9F motherboard memory rules
  • Major OEM Samsung, Micron or Hynix chips for enterprise-grade reliability

Exact-Match DDR5 Server Memory Kit

This 128 GB kit consists of two 64 GB DDR5 RDIMMs rated at 6400 MT/s with CL52 latency. Registered ECC architecture and 1.1 V operation meet the strict timing and voltage requirements of the target platform. It is built for administrators who need guaranteed recognition at full capacity on the specified Supermicro motherboard.

Verified Fitment for Supermicro X14SDW

The modules use the 288-pin RDIMM form factor that this board requires, not UDIMM or SODIMM. Registered buffering offloads the memory controller so every slot can run fully populated at rated speed. ECC corrects single-bit errors on the fly to prevent silent data corruption. Buyers who need a different form factor or non-ECC memory should look elsewhere.

Sustained Enterprise Stability

Registered design maintains signal integrity across all populated slots during continuous workloads. ECC protection operates constantly to catch and correct errors before they affect production systems. The 1.1 V operating voltage supports efficient long-term deployment. Systems requiring higher frequencies or lower latencies than CL52 will not be served by this kit.

How it compares

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

Price $3,944.99
Pricier than about 76% 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 $30.82 per GB
Pricier than about 88% 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 CAS latency will the kit run at when fully populated on the Supermicro X14SDW-42C-SP9F?

The modules are rated CL52 at DDR5-6400 and will operate at that timing when the motherboard applies its validated profile.

How much heat do two 64 GB RDIMMs without spreaders add to a fully populated chassis running all day?

Registered DDR5 at 1.10 V and 6400 MT/s draws minimal power per module; total thermal load is well within standard server airflow limits.

Which motherboard slot layout and memory population rules must already be in place for this 2x64 GB kit to work?

The Supermicro X14SDW-42C-SP9F requires 288-pin Registered DDR5 DIMMs; consult its manual for supported capacities, approved DIMM population order, and installation steps before purchase.

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