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Four green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM RS720A-E12-RS12 512GB (4x128GB) DDR5 4800MHz ECC RDIMM memory upgrade

SKU CH-SPSR-EJM6M MPN RS720A-E12-RS12

512GB kit of four 128GB DDR5 4800MHz ECC registered RDIMMs for ASUS RS720A-E12-RS12 servers

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 512GB total capacity for demanding server workloads
  • DDR5 4800 speed with PC5-38400 bandwidth
  • ECC registered design protects data integrity
  • 4Rx4 128GB modules at 1.1V operating voltage
  • 288-pin RDIMM kit validated for ASUS RS720A-E12-RS12

512GB DDR5 ECC RDIMM kit

This 512GB kit contains four 128GB DDR5 4800MHz registered DIMMs with ECC. It targets administrators upgrading the ASUS RS720A-E12-RS12 dual-processor server for virtualisation or database workloads.

DDR5 4800 registered limits

The modules run at 1.10V with CL40 latency and a 4Rx4 organisation. Registered buffering and ECC add command-cycle overhead, so sustained throughput depends on the platform memory controller and population rules.

Tool-less DIMM installation

Modules insert vertically into the 288-pin slots and lock with the retention levers. Common issues include mixing ranks across channels, populating slots in the wrong order for the specific CPU configuration, and forgetting to enable ECC in BIOS.

How it compares

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

Price $15,468.99
Pricier than about 91% 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 $30.21 per GB
Pricier than about 86% 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

Should I choose the 512GB kit or a smaller capacity for the RS720A-E12-RS12 server?

The 512GB kit provides four 128GB modules for maximum supported capacity. Smaller kits are available if your workload does not require the full 512GB.

What does the 4800MHz rating mean once installed in the ASUS RS720A-E12-RS12?

The modules run at DDR5 4800 (PC5-38400) with CL40 latency at 1.1V, delivering the rated throughput when the server memory controller operates at that speed.

Does the 288-pin DDR5 RDIMM interface limit the 4800MHz speed in practice?

The 288-pin RDIMM form factor is the standard for DDR5 registered memory. The 4800MHz speed is the native JEDEC rate for this module; the server chipset determines the final operating frequency.

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