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Four green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM 256GB 4x64GB DDR5 6400 CL52 4Rx4 ECC RDIMM Supermicro X14SDW-72C-SP9F memory upgrade

SKU CH-4DMK-VRTPJ

256 GB kit of four 64 GB DDR5 6400 CL52 4Rx4 ECC registered RDIMMs validated for the Supermicro X14SDW-72C-SP9F motherboard

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 256GB 4X64GB

Show 4 more
  • 256GB total capacity from four 64GB modules maximises server memory density
  • DDR5-6400 speed with CL52 latency delivers rated bandwidth for demanding workloads
  • Registered ECC architecture offloads the controller and corrects single-bit errors automatically
  • 1V operation matches the platform's voltage requirement for stable full-population performance
  • Verified 288-pin RDIMM fitment for the Supermicro X14SDW-72C-SP9F motherboard

Exact-match server upgrade

This 256GB kit contains four 64GB DDR5 6400 RDIMM modules built to the Supermicro X14SDW-72C-SP9F memory controller's exact rank, voltage and timing requirements. The 4Rx4 registered ECC design allows full-capacity recognition at rated speed without down-clocking. It targets administrators who need maximum density in every available slot. ||

Registered ECC stability

Registered architecture buffers address and command signals so the memory controller drives a fully populated array at 6400 MT/s, while on-die ECC corrects single-bit errors before they reach the operating system. The 1.1V operating voltage matches the platform specification, reducing power draw compared to higher-voltage alternatives. No heat spreaders are included, relying on server chassis airflow. ||

Slot-order installation

The kit installs in the motherboard's 288-pin DDR5 DIMM slots following the population sequence documented in the Supermicro manual; deviating from that order can prevent POST or limit capacity. Modules are keyed to prevent backward insertion, but the 4Rx4 density demands correct slot pairing for dual-channel operation. Verify the approved configuration before seating all four modules.

How it compares

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

Price $8,228.99
Pricier than about 85% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $32.14 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 numberMR51200-944K4
Total capacity256 GB (4 × 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 items256 GB 4 × 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 4Rx4 ECC RDIMM modules need any firmware updates or periodic replacement under normal server workloads?

The modules are built with major OEM Samsung Micron or Hynix chips and carry a lifetime replacement warranty so no scheduled replacement or firmware updates are required.

What limit appears first when the 256GB kit runs at DDR5 6400 CL52 continuously across all four slots?

The registered ECC architecture offloads the memory controller letting every slot stay fully populated at rated speed so the first limit is the motherboard maximum capacity not the modules themselves.

How much heat and power does the 1.1V 4x64GB kit generate when the Supermicro X14SDW-72C-SP9F runs all day?

Operating at 1.1 volts with no heat spreaders the RDIMMs run cool and draw minimal power so sustained loads stay within normal server thermal and power envelopes.

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