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Two green DDR5 RDIMM sticks with black chips and gold contacts

NEMIX RAM

NEMIX RAM RS720Q-E11-RS8U 256GB (2x128GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-MBF0-M7ES9 MPN RS720Q-E11-RS8U

Dual 128 GB DDR5 4800 CL40 ECC RDIMM kit delivers 256 GB of registered server memory for the ASUS RS720Q-E11-RS8U

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256 GB total capacity from two 128 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered design protects data integrity under load
  • 1 V operation keeps power draw low for dense servers
  • Validated for ASUS RS720Q-E11-RS8U 2U4N high-density platforms

Capacity and purpose

This 256GB kit provides two 128GB DDR5 4800 CL40 ECC registered DIMMs built for the ASUS RS720Q-E11-RS8U high-density server. The 4Rx4 organization and 1.1V operation target memory-intensive workloads that demand error correction and maximum density per slot.

Build integration

Each 288-pin module installs directly into the server's RDIMM slots without a heat spreader, keeping the profile compatible with dense 2U chassis airflow. Registered buffering and on-die ECC reduce electrical load on the memory controller, allowing the platform to populate all channels at the rated 4800MT/s speed.

Upgrade context

The kit replaces lower-capacity or non-ECC DDR5 RDIMMs when the application requires 256GB in a two-module configuration. The step up is justified when virtual machine density, in-memory databases or scientific computing exceed the limits of smaller registered kits and the motherboard qualifies this part number.

How it compares

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

Price $7,080.99
Pricier than about 83% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $27.66 per GB
Pricier than about 77% 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 numberMR38400-744K2
Total capacity256 GB (2 × 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 items256 GB (2 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

What is the first limit that appears under sustained load with the 4Rx4 DDR5 4800 modules?

The 4Rx4 organisation and CL40 latency set the throughput ceiling during continuous server workloads.

How much heat and power do the 1.1 V registered DIMMs generate when running all day?

Each 128 GB module operates at 1.1 V without a heat spreader, relying on chassis airflow for cooling.

Which ASUS 2U4N high-density server model must already be installed for this kit to work?

The memory is validated for the RS720Q-E11-RS8U platform and requires that exact server to function.

More in Model-Specific Memory Upgrades

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