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Six green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM RS720-E11-RS12U 768GB (6x128GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-EZVN-81HQZ MPN RS720-E11-RS12U

768 GB DDR5-4800 ECC registered server kit (6×128 GB, CL40, 1.1 V, 288-pin) validated for the ASUS RS720-E11-RS12U 2U dual-socket platform

  • Total capacity768 GB (6 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • Massive 768 GB capacity for heavy workloads
  • DDR5 4800 speed with CL40 latency
  • ECC registered design ensures data integrity
  • 1 V operation reduces power draw
  • Six 128 GB modules in 288-pin RDIMM form factor

Compatibility & Use

This 768GB DDR5 ECC registered DIMM kit is built for the ASUS RS720-E11-RS12U 2U dual-socket server. IT teams running virtualisation, databases or high-performance computing workloads gain the capacity and error correction those tasks demand.

Other Buyers

Workstations or desktops that accept only unbuffered non-ECC memory cannot use these registered modules. Systems limited to lower maximum capacities or slower DDR5 speeds will not support the full 6x128GB configuration at 4800MT/s.

Deciding Specification

The 4Rx4 organisation across six 128GB modules delivers 768GB at DDR5 4800 CL40 with 1.10V operation. Verify that the server memory controller and BIOS support this rank structure and total capacity before purchase.

How it compares

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

Price $22,048.99
Pricier than about 92% of the 21,161 comparable items (median $397.99).
Total capacity 768 GB (6 × 128 GB)
Higher than about 92% of the 20,941 comparable items (median 32 GB).
Price per GB $28.71 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 numberMR38400-744K6
Total capacity768 GB (6 × 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 items768 GB (6 × 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 do I install the six 128GB DDR5 RDIMMs in the ASUS RS720-E11-RS12U and which slot sequence is the step most people get wrong?

Populate all twelve DDR5 slots in the order shown in the ASUS RS720-E11-RS12U manual — typically alternating between CPU sockets — so each channel receives one 4Rx4 module before any channel receives a second.

What maintenance or replacement will the 768GB DDR5 ECC registered kit need over its service life?

No scheduled maintenance is required; the modules carry a lifetime replacement warranty, so a failed 128GB 4Rx4 RDIMM is swapped for a new unit of the same specification.

What limit appears first when the 4800 MT/s DDR5 kit runs sustained workloads in the RS720-E11-RS12U?

The 4Rx4 organisation and CL40 latency at 1.10 V mean memory-controller thermal throttling or bandwidth saturation typically arrives before the DDR5-4800 speed ceiling.

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