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Two green DDR5 RDIMM modules with gold contacts, no heat spreader

NEMIX RAM

NEMIX RAM 256GB (2x128GB) DDR5 5600 ECC RDIMM CL46 1.1V 4Rx4 Supermicro X14SDW-42C-SP9F memory upgrade

SKU CH-18EH-Z6M1N

A 256 GB registered ECC DDR5 kit with two 128 GB modules running at 5600 MHz, CL46 and 1.1 V for the Supermicro X14SDW-42C-SP9F motherboard

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 5600 (PC5 44800)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL46
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 256GB 2X128GB

  • 256GB kit runs at full DDR5-5600 speed with exact CL46 timing and 1.1V voltage
  • Registered ECC design corrects single-bit errors on the fly preventing silent data corruption
  • 4Rx4 organisation lets every slot stay fully populated at maximum 128GB per module
  • 288-pin RDIMM form factor matches Supermicro X14SDW-42C-SP9F memory population rules precisely
  • Major OEM Samsung, Micron or Hynix chips deliver enterprise-grade reliability for continuous server workloads

256 GB DDR5 ECC RDIMM kit

This 256 GB kit contains two 128 GB DDR5 5600 registered ECC RDIMMs built for the Supermicro X14SDW-42C-SP9F motherboard. Each module runs at 1.1 V with CL46 latency and a 4Rx4 organisation. The registered design offloads the memory controller so every slot can be fully populated at rated speed.

Upgrading from smaller RDIMM sets

Replacing a lower-capacity RDIMM kit with this 256 GB set adds the headroom needed for large in-memory databases or virtualisation clusters. The jump is worth it when the workload exceeds the capacity of the existing modules and the board's population rules allow two 4Rx4 DIMMs per channel.

Build fit and requirements

The kit requires a motherboard that accepts 288-pin DDR5 RDIMMs and supports 4Rx4 registered ECC modules at 5600 MT/s. It frees the memory controller from address loading so the server can run fully populated without downclocking. Verify the system manual for approved DIMM population order before installation.

How it compares

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

Price $9,323.99
Pricier than about 86% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $36.42 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 numberMR44800-744K2
Total capacity256 GB (2 × 128 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 5600 (PC5 44800)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL46
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items256 GB 2 × 128 GB DDR5 5600 MHz PC5-44800 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 DDR5 RDIMM modules fit the memory slots on my Supermicro X14SDW-42C-SP9F motherboard?

Yes, this kit uses the exact 288-pin Registered DDR5 form factor that the X14SDW-42C-SP9F requires. It is not a UDIMM or SODIMM, so it matches the board's physical slot keying.

What is the correct population order when installing both 128GB 4Rx4 modules, and what step is commonly missed?

Consult the motherboard manual for the approved DIMM population sequence; the step most often missed is verifying the specific slot order before seating both modules.

Do these 4Rx4 Registered ECC modules require any firmware updates or ongoing maintenance after installation?

No firmware updates are needed for the memory itself; the modules are sealed with no heat spreader and no moving parts, so they run maintenance-free once seated and recognised by the system BIOS.

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