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Six green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM RS700A-E12-RS12U 768GB (6x128GB) DDR5 4800 ECC RDIMM memory upgrade

SKU CH-3D9F-7MCYY MPN RS700A-E12-RS12U

A 768 GB DDR5 4800 registered ECC kit of six 128 GB RDIMMs built for the ASUS RS700A-E12-RS12U server

  • Total capacity768 GB (6 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 768GB total capacity supports memory-intensive server workloads
  • DDR5 4800 speed delivers high bandwidth for data processing
  • ECC registered design protects data integrity in critical applications
  • 1V operation reduces power consumption per module
  • Validated for ASUS RS700A-E12-RS12U 1U dual-processor servers

Compatibility

This 768GB DDR5 kit is configured specifically for the ASUS RS700A-E12-RS12U 1U dual-processor server. Six 128GB registered DIMMs deliver ECC error correction for mission-critical workloads. The modules operate at 1.10V with CL40 latency at 4800 MT/s. Builders using other platforms or non-ECC boards cannot use this kit.

Thermals

Registered DDR5 modules run at 1.10V, reducing power draw compared with earlier generations. No heat spreaders are fitted, so airflow through the 1U chassis must handle thermal dissipation. Under sustained load the ECC logic adds minimal overhead while maintaining signal integrity. Acoustic output depends entirely on the server fan profile.

Installation

The package contains six 288-pin RDIMMs pre-validated for the target ASUS system. No additional software, drivers or configuration utilities are bundled. System stability relies on the motherboard memory controller and BIOS defaults. IT staff should consult the server manual for population rules before installing all six modules.

How it compares

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

Price $22,590.99
Pricier than about 92% of the 21,161 comparable items (median $397.99).
Total capacity 768 GB (6 × 128 GB)
Higher than about 92% of the 20,941 comparable items (median 32 GB).
Price per GB $29.42 per GB
Pricier than about 83% 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 numberMR38400-744K6
Total capacity768 GB (6 × 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 items768 GB (6 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

How do I install the six 128GB DDR5 RDIMMs into the ASUS RS700A-E12-RS12U server, and which step is most often missed?

Power down the server, open the chassis, and insert each 288-pin module into the correct DIMM slots per CPU following the motherboard's population guide for 4Rx4 registered memory; the step most often missed is verifying the BIOS recognises all 768GB at DDR5 4800 after the first boot.

What maintenance or replacement will this 768GB DDR5 ECC RDIMM kit need over its service life?

The modules have no heat spreaders and no moving parts, so routine maintenance is limited to keeping server airflow clean; replacement is only required if a module fails ECC correction or the platform is upgraded beyond DDR5 4800.

What limit appears first when this memory runs sustained workloads on the RS700A-E12-RS12U?

The registered 4Rx4 organisation at CL40 latency and 1.10V voltage sets the electrical and timing ceiling; sustained throughput is capped by the DDR5 4800 data rate before thermal or power limits are reached.

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