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Four green DDR5 RDIMM sticks with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM RS720A-E12-RS24U 512GB (4×128GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-ZW1Z-MM3VX MPN RS720A-E12-RS24U

512 GB DDR5 server kit with four 128 GB ECC registered modules at 4800 MT/s CL40 for ASUS RS720A-E12-RS24U

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 512 GB total capacity from four 128 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered design protects data integrity in servers
  • Low 1.10 V operating voltage reduces power draw
  • Validated for ASUS RS720A-E12-RS24U 2U dual-processor server

Server Memory Kit

This 512GB kit contains four 128GB DDR5 4800 CL40 ECC registered DIMMs built for the ASUS RS720A-E12-RS24U dual-processor server. It targets administrators who need maximum registered capacity for virtualization or database workloads on that specific platform.

Straightforward DIMM Installation

The 288-pin modules seat in the standard DDR5 RDIMM slots; the server chassis must be opened and the CPU trays accessed per the ASUS service guide. Common issues include mixing ranks across channels, failing to populate all four modules as a matched set, or neglecting the required BIOS update for 4Rx4 density.

Verify Platform Requirements First

Confirm the system is the exact RS720A-E12-RS24U model and that the current BIOS revision supports 128GB 4Rx4 registered modules at 1.10V. Ensure all twelve DIMM slots per processor are free for a balanced population and that the operating system and applications can address the full 512GB capacity.

How it compares

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

Price $14,212.99
Pricier than about 90% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (4 × 128 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $27.76 per GB
Pricier than about 78% 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 numberMR38400-744K4
Total capacity512 GB (4 × 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 items512 GB (4 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

How can I confirm the kit is running at DDR5 4800 with CL40 after installation?

Check the memory speed and latency in the server BIOS or with a tool such as CPU-Z; they should report 4800 MT/s and CL40 for each 128 GB module.

What comes in the package and is anything else required for the RS720A-E12-RS24U?

The box contains four 128 GB DDR5 4800 CL40 ECC RDIMM modules for a total of 512 GB; no extra parts are needed for the ASUS RS720A-E12-RS24U server.

Should I choose the 512 GB 4×128 GB kit or a different capacity for this server?

The 512 GB kit fills four slots with 128 GB 4Rx4 RDIMMs; select it when the RS720A-E12-RS24U requires maximum registered ECC capacity at 4800 MT/s.

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