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

NEMIX RAM

NEMIX RAM RS720A-E12-RS24U 128GB (2x64GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-J8DP-DQPJT MPN RS720A-E12-RS24U

128GB DDR5 4800 ECC registered RDIMM kit (2×64GB) validated for ASUS RS720A-E12-RS24U dual-processor servers

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128 GB kit expands server capacity for heavy workloads
  • 2×64 GB DDR5 4800 modules deliver 38400 MT/s bandwidth
  • ECC registered RDIMM protects data integrity in critical tasks
  • CL40 latency at 1.10 V balances speed and efficiency
  • Validated for ASUS RS720A-E12-RS24U 2U dual-processor server

Product Identity

This NEMIX RAM kit provides 128GB of DDR5 4800 ECC registered memory in a 2x64GB configuration. It is built for the ASUS RS720A-E12-RS24U 2U dual-processor server where registered DIMMs are required for stability. The modules operate at 1.1V with CL40 latency and use major OEM chips from Samsung, Micron or Hynix.

Suitability

IT teams maintaining or expanding that specific ASUS server platform will find guaranteed compatibility and registered ECC operation. Systems that need unbuffered memory, non-ECC modules, lower densities or different pin counts cannot use this kit. Builders working on desktop boards, workstations without registered support or other server models should look elsewhere.

Deciding Specification

The registered ECC RDIMM form factor with 2Rx4 organisation is the single specification that determines fit. Only motherboards wired for DDR5 registered DIMMs with ECC support and the correct pin-out will accept these modules.

How it compares

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

Price $3,668.99
Pricier than about 75% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (2 × 64 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $28.66 per GB
Pricier than about 81% 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 numberMR38400-924K2
Total capacity128 GB (2 × 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 items128 GB (2 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Will the registered ECC RDIMM modules need firmware updates or chip replacements during their service life?

No firmware updates or chip replacements are required; the 2Rx4 Samsung, Micron or Hynix ICs are validated once and run for the lifetime of the server.

What is the first limit reached when the kit runs at DDR5 4800 continuously under full load?

The CL40 latency at 1.10 V is the fixed timing ceiling; bandwidth stays at PC5-38400 and the registered buffer prevents signal degradation.

How much heat and power does the 128 GB kit produce when the ASUS RS720A-E12-RS24U operates 24/7?

Each 64 GB module draws 1.10 V with no heat spreader, so total power stays low and standard server airflow handles the thermal load.

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