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Twelve green DDR5 RDIMM modules in a row

NEMIX RAM

NEMIX RAM RS720QA-E12-RS8U 768GB 12x64GB DDR5 4800 CL40 1.1V 2Rx4 ECC RDIMM memory upgrade

SKU CH-E2CY-WAT2J MPN RS720QA-E12-RS8U

768 GB DDR5 server kit with twelve 64 GB ECC registered modules at 4800 MT/s CL40 for ASUS RS720QA-E12-RS8U

  • 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 twelve 64 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered design detects and corrects memory errors
  • 1 V operating voltage reduces server power draw
  • 288-pin RDIMM form factor fits ASUS RS720QA-E12-RS8U

Targeted server upgrade

This 768GB kit delivers twelve 64GB DDR5 4800 RDIMM modules built for the ASUS RS720QA-E12-RS8U rack server. Registered ECC operation and a 2Rx4 organisation provide the data integrity and density that virtualisation hosts and database clusters require. The 1.1V voltage matches the platform specification exactly.

Straightforward module installation

Each 288-pin DIMM seats in the standard DDR5 server slots without tools or adapters. The only common issue is populating all twelve slots in the correct channel order; the motherboard manual defines the required sequence for full 768GB recognition. No heat spreaders are fitted, so airflow clearance is unchanged.

Steady throughput under load

Rated at PC5-38400 with CL40 latency, the modules sustain their rated bandwidth during extended compute runs because registered buffering reduces electrical load on the memory controller. ECC correction operates continuously without performance penalty, preventing silent data corruption during multi-hour render or simulation jobs.

How it compares

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

Price $21,523.99
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 $28.03 per GB
Pricier than about 79% 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

How do I verify the 12 modules are running at 4800 MT/s with CL40 and ECC active after installation?

Enter the server BIOS or UEFI and confirm the memory speed shows 4800 MT/s, the CAS latency reads CL40, and ECC status is reported as enabled for all 12 slots.

What does the 768GB kit contain and is anything else required to populate the RS720QA-E12-RS8U?

The kit includes twelve 64GB 288-pin DDR5 RDIMMs, each rated 1.1 V, 2Rx4, CL40. No additional parts are needed to fill the compatible ASUS 2U4N rack server.

Why choose the 12 x 64GB configuration instead of a smaller capacity for this server model?

The 12-module, 768GB kit matches the maximum supported DIMM count for the RS720QA-E12-RS8U, delivering the highest total capacity while maintaining registered ECC operation at 4800 MT/s.

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