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Two green DDR5 RDIMM modules without heat spreaders

NEMIX RAM

NEMIX RAM DDR5 6400 128GB 2x64GB CL52 1.1V 4Rx4 ECC RDIMM Supermicro X14SDV-42C-SP3F memory upgrade

SKU CH-PTDF-45G60

128 GB DDR5-6400 2×64 GB 4Rx4 registered ECC RDIMM kit validated for Supermicro X14SDV-42C-SP3F

  • 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 in a matched 2 x 64 GB kit
  • DDR5 6400 speed rated at PC5-51200
  • CL52 latency at 1.10 V operating voltage
  • 4Rx4 registered ECC RDIMM for enterprise stability
  • Verified compatibility with Supermicro X14SDV-42C-SP3F motherboard

Exact-Match DDR5-6400 Server Upgrade

This 128GB kit delivers two 64GB DDR5-6400 Registered ECC RDIMMs built to the precise rank, voltage, and timing the Supermicro X14SDV-42C-SP3F memory controller expects. The 4Rx4 organization and 1.1V operation allow full-capacity recognition at rated speed without manual tuning. It targets administrators who need guaranteed compatibility in a validated server platform.

Replaces Mismatched or Lower-Capacity DIMMs

Swapping mixed-rank or slower modules for this spec-matched pair eliminates population-rule conflicts and restores the board's intended memory topology. The jump is worthwhile when current DIMMs force downclocking, limit total capacity, or lack ECC protection for production workloads. Builders using UDIMMs or SODIMMs cannot use this Registered form factor.

128GB Headroom for Dense Virtualization

The 128GB total (2 x 64GB) comfortably hosts large VM fleets, in-memory databases, and multi-tenant containers while ECC corrects single-bit errors on the fly. Registered buffering keeps every slot stable at full load. Capacity runs out when workloads exceed 128GB or require higher frequencies than DDR5-6400 provides.

How it compares

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

Price $4,130.99
Pricier than about 77% 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 $32.27 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

Will the 288-pin RDIMM modules fit the Supermicro X14SDV-42C-SP3F motherboard slots?

Yes, this kit uses the 288-pin DDR5 RDIMM form factor that the Supermicro X14SDV-42C-SP3F requires. It is not a UDIMM or SODIMM, so it matches the board's physical slot keying.

What installation step is often missed when populating all slots with these 4Rx4 modules?

The motherboard manual specifies a required DIMM population order for full-capacity operation. Install the two 64 GB modules in the exact slots listed in that order, or the system may not recognise the full 128 GB at DDR5-6400.

Do the modules need active cooling or heat-spreader maintenance over time?

No heat spreader is fitted on these modules. Standard server airflow across the bare DRAM is sufficient; no extra cooling or spreader upkeep is required.

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