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Two green DDR5 RDIMM modules, 288-pin, no heat spreader

NEMIX RAM

NEMIX RAM RS720-E11-RS12U 256GB (2x128GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-7Z3X-TDJYN MPN RS720-E11-RS12U

A 256 GB DDR5 4800 CL40 ECC registered server memory kit with two 128 GB modules for ASUS RS720-E11-RS12U

  • Total capacity256 GB (2 × 128 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 workloads
  • 4800 MT/s DDR5 speed enables high-throughput data processing
  • ECC registered design detects and corrects single-bit errors
  • 1 V operating voltage reduces server power draw
  • Validated for ASUS RS720-E11-RS12U 2U dual-socket servers

System-specific DDR5 ECC kit

This NEMIX RAM kit delivers 256GB of DDR5 4800 ECC registered memory in two 128GB modules. It is built for the ASUS RS720-E11-RS12U 2U dual-socket server. The 4Rx4 organisation and 1.1V operation match the platform's registered DIMM requirements.

Registered DIMMs for dual-socket density

Each 288-pin module installs directly into the server's RDIMM slots without a heat spreader. Registered buffering reduces electrical load on the memory controller, allowing the full 256GB capacity across both CPU sockets. ECC protection corrects single-bit errors to maintain data integrity.

Low-voltage DDR5 thermals

The 1.1V DDR5 modules run cooler than previous-generation registered memory at equivalent density. Passive airflow through the 2U chassis is sufficient for normal workloads. No additional cooling hardware is required and acoustic output remains at chassis-fan levels.

How it compares

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

Price $7,986.99
Pricier than about 84% 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 $31.20 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 lineASUS Server Motherboard Compatible Series Memory
Model nameASUS DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-744K2
Total capacity256 GB (2 × 128 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 rank4Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASUS
In the box
Included items256 GB (2 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Will the 4Rx4 rank configuration limit how many modules the RS720-E11-RS12U motherboard can accept?

Each module is 4Rx4, so two modules present eight ranks to the memory controller; the server's qualified vendor list confirms this 256 GB kit is supported.

What temperature rise or fan-speed change should I expect when the kit runs continuously at 4800 MT/s?

The modules operate at 1.10 V with no heat spreaders; under sustained load the server's existing airflow typically keeps DIMM temperatures within spec without extra fan rpm.

Which existing server components are required for this memory to function?

An ASUS RS720-E11-RS12U 2U dual-socket server with DDR5 RDIMM slots and a BIOS version that recognises 128 GB 4Rx4 registered ECC modules.

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