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Four green DDR5 RDIMM modules, bare circuit boards with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM 256GB (4x64GB) DDR5 4800MHz CL40 ECC RDIMM memory upgrade

SKU CH-86W6-6X14Q

256 GB DDR5 server kit with four 64 GB registered ECC modules at 4800 MHz CL40 for ASUS S14NA-U12 boards

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256 GB total capacity for memory-intensive server workloads
  • DDR5 4800 MT/s speed with PC5-38400 bandwidth for fast data throughput
  • ECC registered RDIMM design detects and corrects errors to protect data integrity
  • 1 V operating voltage reduces power draw in dense configurations
  • Validated for ASUS S14NA-U12 server board for guaranteed compatibility

Server memory kit for ASUS S14NA-U12

This 256 GB kit supplies four 64 GB DDR5 RDIMM modules built for the ASUS S14NA-U12 server board. ECC and registered operation protect data integrity in multi-socket environments. The kit targets IT teams who need validated capacity for virtualization hosts or database nodes.

Sustained load behavior with ECC registered design

Registered buffering reduces electrical load on the memory controller during continuous throughput. ECC corrects single-bit errors in real time without halting the system. The 1.1 V operating voltage keeps power draw predictable across fully populated channels.

256 GB total capacity in four 64 GB modules

The four-module population fills the board's supported slots for maximum density. Each module runs at DDR5 4800 with CL40 latency and 2Rx4 organization. Buyers who need more storage or non-ECC unbuffered memory should look elsewhere.

How it compares

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

Price $6,951.99
Pricier than about 83% 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 $27.16 per GB
Pricier than about 75% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineASUS Server Motherboard Compatible Series Memory
Model nameASUS DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-924K4
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank2Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASUS
In the box
Included items256 GB (4 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

At 1.1 V and CL40, how much heat do four 64 GB DDR5 RDIMMs generate under sustained load?

The kit runs at 1.10 V with CL40 latency; registered DDR5 modules at this voltage typically stay cool in a server chassis with normal airflow, and the lack of a heat spreader means they rely on system fans for cooling.

What motherboard feature must my ASUS server board provide for this 256 GB kit to function?

The board must support 288-pin DDR5 RDIMM slots, registered ECC operation, and 2Rx4 organisation at 4800 MT/s (PC5-38400) with 1.10 V supply.

Can I mix these 2Rx4 registered ECC modules with single-rank unbuffered DDR5 DIMMs already installed?

No — registered ECC RDIMMs and unbuffered UDIMMs use different signalling and cannot be mixed on the same channel or motherboard.

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