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Four green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM 256GB 4x64GB DDR5 6400 CL52 1.1V 4Rx4 ECC Registered RDIMM memory upgrade

SKU CH-M4SH-2S47F

256 GB kit of four 64 GB DDR5-6400 CL52 1.1 V 4Rx4 ECC registered RDIMMs validated for the Supermicro X14SDW-40C-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

  • 256 GB total capacity from four 64 GB modules for dense server workloads
  • DDR5 6400 speed with CL52 latency runs at the rated frequency your board expects
  • Registered ECC architecture offloads the memory controller and corrects single-bit errors on the fly
  • 10 V operation matches the voltage profile required for stable full-population deployment
  • 288-pin RDIMM form factor verified for the Supermicro X14SDW-40C-SP9F motherboard

NEMIX RAM 256GB DDR5 6400 ECC RDIMM Kit

This 256GB kit contains four 64GB DDR5 6400 Registered ECC RDIMMs built to CL52 timings at 1.1V. It is designed for servers and workstations that require registered memory with error correction and exact rank configuration.

Suits Supermicro X14SDW-40C-SP9F validated systems

Ideal for administrators upgrading a Supermicro X14SDW-40C-SP9F motherboard that supports DDR5 6400 RDIMMs. Not for builds needing unbuffered UDIMMs, SODIMM form factor, non-ECC memory, or capacities beyond this board's validated limits.

4Rx4 registered ECC rank configuration

The 4Rx4 organization with registered buffering is the single specification that determines compatibility with the memory controller population rules. Matching this rank, voltage, and timing allows full-capacity recognition at rated speed.

How it compares

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

Price $8,988.99
Pricier than about 86% 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 $35.11 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

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Questions about this item

What speed does the DDR5-6400 interface run at on the Supermicro X14SDW-40C-SP9F?

The kit operates at DDR5 6400 (PC5-51200) with CL52 latency at 1.1V, matching the motherboard's rated speed when all four slots are populated.

What physical slot and form factor do these 64 GB modules need?

Each module is a 288-pin DDR5 RDIMM measuring standard DIMM height; the board requires Registered DIMMs in its four DDR5 slots, not UDIMMs or SODIMMs.

In which order should the four 4Rx4 sticks be installed on this board?

Consult the Supermicro X14SDW-40C-SP9F manual for the exact DIMM population sequence; the common mistake is skipping the prescribed slot order, which prevents full 256 GB recognition.

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