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Eight green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM RS720A-E12-RS12 512GB (8×64GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-2CYW-RM4M5 MPN RS720A-E12-RS12

Eight 64 GB DDR5 4800 CL40 ECC registered DIMMs totalling 512 GB for ASUS RS720A-E12-RS12 servers

  • Total capacity512 GB (8 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 512 GB total capacity from eight 64 GB modules
  • DDR5 4800 speed with PC5-38400 bandwidth rating
  • ECC registered RDIMM for server-grade data integrity
  • Low 1.10 V operating voltage for efficient power use
  • 288-pin 2Rx4 configuration compatible with ASUS RS720A-E12-RS12

Compatibility and kit contents

This 512GB kit contains eight 64GB DDR5 4800 CL40 registered ECC RDIMMs built for the ASUS RS720A-E12-RS12 dual-processor 2U server. Each module runs at 1.1V and uses a 2Rx4 organisation with 288 pins. The memory is validated for that specific platform.

Buyers needing non-ECC or unbuffered memory

This product suits administrators expanding the ASUS RS720A-E12-RS12 with fully buffered ECC modules. It is not for desktop PCs, workstations or laptops that require unbuffered non-ECC DIMMs. Builders needing lower capacities or different form factors should look elsewhere.

Registered ECC RDIMM requirement

The single specification that decides fit is the registered ECC RDIMM type. The ASUS RS720A-E12-RS12 only accepts registered modules with error correction; unbuffered or non-ECC DIMMs will not work in this server.

How it compares

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

Price $13,263.99
Pricier than about 90% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (8 × 64 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $25.91 per GB
Pricier than about 71% 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 numberMR38400-924K8
Total capacity512 GB (8 × 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 items512 GB (8 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Does my ASUS RS720A-E12-RS12 server need a specific BIOS version before installing this 512GB DDR5 4800 kit?

The modules are validated for the ASUS RS720A-E12-RS12 platform; consult the motherboard manual for any required BIOS updates to support 64GB 2Rx4 registered DIMMs at 4800MT/s.

Can I mix these 4800MT/s CL40 registered ECC modules with slower DDR5 RDIMMs already in the server?

All installed DIMMs will run at the speed and timings of the slowest module; population rules for the RS720A-E12-RS12 require matched ranks per channel for optimal stability.

How do I confirm the full 512GB is recognised and ECC is active after installation?

Check POST memory count, BIOS setup main screen, and OS tools such as dmidecode or Windows System Information for 512GB total and ECC status enabled.

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