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Twelve green DDR5 RDIMM modules, bare black chips, no heat spreaders, 288 pins

NEMIX RAM

NEMIX RAM 768GB (12x64GB) DDR5 4800 CL40 ECC RDIMM 2Rx4 1.1V memory upgrade

SKU CH-2AYD-AYKFB

768 GB of DDR5 ECC registered memory in a twelve-module kit running at 4800 MT/s with CL40 latency for ASUS server boards

  • Total capacity768 GB (12 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 768 GB total capacity from 12 modules of 64 GB each
  • DDR5 4800 speed rated at PC5-38400 for server workloads
  • ECC registered RDIMM with CL40 latency protects data integrity
  • 2Rx4 dual-rank organisation on 288-pin DDR5 form factor
  • 1 V operating voltage reduces power draw in dense configurations

768GB DDR5 ECC RDIMM kit

This 768GB kit contains twelve 64GB DDR5 4800 registered ECC modules built for the ASUS S14NA-U12 server board. It targets administrators who need maximum memory capacity for virtualization, databases or high-performance computing workloads. The registered design and error-correcting code protect data integrity in mission-critical environments.

Registered ECC with 2Rx4 organisation

Each module uses a 2Rx4 configuration and operates at 1.1V with CL40 latency at the DDR5 4800 (PC5-38400) data rate. The registered buffer reduces electrical load on the memory controller, allowing all twelve DIMMs to run simultaneously without signal degradation. ECC detects and corrects single-bit errors to maintain system stability under sustained load.

288-pin RDIMM form factor, no heat spreader

The bare 288-pin modules fit standard DDR5 RDIMM slots and rely on server chassis airflow for cooling. Absence of a heat spreader keeps the stack height low, easing installation in dense 1U or 2U enclosures where adjacent DIMM slots are tightly spaced. Compatibility is validated specifically for the ASUS S14NA-U12 platform.

How it compares

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

Price $20,669.99
Pricier than about 91% of the 21,161 comparable items (median $397.99).
Total capacity 768 GB (12 × 64 GB)
Higher than about 92% of the 20,941 comparable items (median 32 GB).
Price per GB $26.91 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 numberMR38400-924K12
Total capacity768 GB (12 × 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 items768 GB (12 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Will the 12 modules in this 768GB kit ever need replacement under normal server operation?

Registered ECC DDR5 modules have no moving parts and are rated for continuous duty; replacement is only needed if a module fails validation or a capacity upgrade is required.

What limit appears first when all 12 DIMMs run at DDR5 4800 CL40 under sustained load?

The memory controller’s maximum supported rank count per channel is reached before bandwidth or thermal limits become a factor.

How much heat and power does the 1.1V registered kit produce when the server runs all day?

Each 64GB 2Rx4 RDIMM operates at 1.1V without a heat spreader, so total power draw scales with the 12-module population and airflow handles the resulting heat.

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