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Four green DDR5 RDIMM modules without heat spreaders in a kit

NEMIX RAM

NEMIX RAM DDR5 6400 256GB 4x64GB CL52 1.1V 4Rx4 ECC RDIMM Supermicro X14SDW-64C-SP9F memory upgrade

SKU CH-8QHJ-WDYXZ

A 256 GB DDR5 6400 registered ECC kit in four 64 GB modules at 1.1 V and CL52, built for the Supermicro X14SDW-64C-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
  • 256 GB total capacity from four 64 GB modules
  • DDR5 6400 speed with CL52 latency at 1.1 V
  • Registered ECC design corrects errors and supports full population
  • 4Rx4 288-pin RDIMM form factor matches Supermicro X14SDW-64C-SP9F
  • Major OEM chips from Samsung Micron or Hynix ensure enterprise stability

256GB DDR5-6400 ECC RDIMM kit

This 256GB kit contains four 64GB DDR5-6400 registered ECC modules built for the Supermicro X14SDW-64C-SP9F motherboard. The 4Rx4 organisation, 1.1V operation and CL52 timing match the board's memory controller requirements so the full capacity is recognised at rated speed. It targets administrators who need maximum registered memory in a validated configuration.

Installation and population rules

The modules use the standard 288-pin RDIMM form factor and install like any registered DIMM, but the motherboard manual defines the approved slot order and maximum supported capacity per slot. Deviating from the documented population sequence can prevent the system from posting or limit the usable memory. No heat spreader is fitted, so airflow across the modules must follow the chassis design.

DDR5 registered ECC limits

DDR5 registered ECC memory offloads electrical load to the onboard register, allowing full population at 6400 MT/s, yet the platform's memory controller and BIOS ultimately cap the achievable speed and total capacity. ECC corrects single-bit errors on the fly, but it cannot recover from multi-bit failures or replace a faulty module. The 1.1V supply is fixed by the DDR5 specification for this data rate.

How it compares

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

Price $8,500.99
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 $33.21 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

How can I confirm the kit is running at DDR5 6400 CL52 after installing it in the Supermicro X14SDW-64C-SP9F?

Enter the BIOS or UEFI and check that each of the four slots shows 64 GB at 6400 MT/s with timings of 52-52-52 and voltage at 1.10 V. The registered ECC RDIMM design ensures the memory controller recognises the full 256 GB capacity at rated speed.

What comes in the box and do I need any extra parts to install the 4 x 64 GB kit?

The package contains the four 288-pin DDR5 RDIMM modules only. No heat spreaders, cables, tools or additional brackets are included or required for the Supermicro X14SDW-64C-SP9F motherboard slots.

Which capacity kit should I choose if the manual lists 64 GB and 256 GB supported configurations?

Select the 256 GB (4 x 64 GB) kit when you want to populate all four channels at maximum density with 4Rx4 registered ECC modules; choose a smaller kit only if your specific CPU or chassis limits total memory.

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