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Six green DDR5 RDIMM modules with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM RS720QA-E12-RS8U 384GB (6x64GB) DDR5 4800 CL40 1.1V 2Rx4 ECC RDIMM memory upgrade

SKU CH-0CGA-DX20P MPN RS720QA-E12-RS8U

Adds 384GB of DDR5 ECC registered memory across six 64GB modules at 4800MT/s CL40

  • Total capacity384 GB (6 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 384 GB total capacity from six 64 GB modules
  • DDR5 4800 speed with CL40 latency for server workloads
  • ECC registered design protects data integrity under load
  • 10 V operation reduces power draw in dense configurations
  • Validated for ASUS RS720QA-E12-RS8U 2U4N rack servers

Compatibility Target

This memory kit is built for the ASUS RS720QA-E12-RS8U high-density 2U4N rack server. It provides 384 GB across six 64 GB registered DDR5 modules that run at 4800 MT/s with CL40 latency and 1.1 V operation. ECC and registered buffering protect data integrity in multi-node deployments.

Who Should Look Elsewhere

Systems that require unbuffered UDIMMs or SO-DIMMs cannot use these 288-pin RDIMMs. Workstations or desktops limited to lower maximum capacities per slot will not accept the 64 GB density. Buyers needing speeds above 4800 MT/s or lower CAS latency should consider other kits.

Deciding Specification

The kit delivers 384 GB total capacity in a six-module registered ECC DDR5 configuration. This specific capacity and form-factor combination determines whether the server can reach its maximum supported memory population.

How it compares

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

Price $9,153.99
Pricier than about 86% of the 21,161 comparable items (median $397.99).
Total capacity 384 GB (6 × 64 GB)
Higher than about 85% of the 20,941 comparable items (median 32 GB).
Price per GB $23.84 per GB
Pricier than about 69% 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 numberMR38400-924K6
Total capacity384 GB (6 × 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 items384 GB (6 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

What is the operating voltage of these 64 GB DDR5 RDIMMs when the server runs continuously?

Each module runs at 1.10 V, the standard DDR5 voltage for registered server memory.

Which server chassis and motherboard combination is this 6x64 GB kit validated for?

The kit is built for the ASUS RS720QA-E12-RS8U 2U4N rack server platform.

Will the 2Rx4 registered ECC modules work in the RS720QA-E12-RS8U alongside any existing DDR5 RDIMMs of the same speed and rank?

Yes, provided the other DIMMs are also DDR5 4800 CL40 2Rx4 registered ECC modules, they can populate the remaining slots.

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