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Sixteen green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM RS720-E11-RS12U 256GB (16x16GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-88NN-73W3H MPN RS720-E11-RS12U

256 GB DDR5 ECC registered server memory kit with sixteen 16 GB modules at 4800 MT/s CL40 for ASUS RS720-E11-RS12U

  • Total capacity256 GB (16 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • Massive 256 GB capacity scales demanding server workloads
  • DDR5 4800 speed feeds data to multi-core CPUs faster
  • ECC registered design corrects errors for non-stop uptime
  • 10 V operation cuts power draw across 16 modules
  • 16 × 16 GB kit fills every slot in the RS720-E11-RS12U

256 GB DDR5 ECC RDIMM kit

This 256 GB kit contains sixteen 16 GB DDR5 4800 registered ECC modules built for the ASUS RS720-E11-RS12U 2U dual-socket server. Each module runs at 1.1 V with CL40 latency and a 1Rx8 organisation. The registered design adds a buffer that helps signal integrity in high-density configurations.

Who this suits and who should look elsewhere

IT teams upgrading the named ASUS server to its full 16-slot capacity will find a matched, tested set that installs without mixing module revisions. Builders working with consumer motherboards, workstations that require unbuffered DIMMs, or servers that need a different pin count or voltage should choose a different kit.

DDR5 4800 registered ECC with 1Rx8 rank

The decisive specification is the combination of DDR5 4800 speed, registered ECC operation and 1Rx8 rank on a 288-pin RDIMM. Only systems qualified for this exact electrical and mechanical profile will accept the modules.

How it compares

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

Price $7,297.99
Pricier than about 83% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (16 × 16 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $28.51 per GB
Pricier than about 80% 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 numberMR38400-618K16
Total capacity256 GB (16 × 16 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 rank1Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASUS
In the box
Included items256 GB (16 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

Will the 16 DDR5 4800 CL40 1.10V 1Rx8 modules run reliably alongside any older DDR5 RDIMMs I keep in the ASUS RS720-E11-RS12U?

All 16 modules are DDR5 4800 CL40 1.10V 1Rx8 registered ECC RDIMMs; mixing different speeds, ranks or voltages can cause instability, so use identical modules for best results.

How can I verify the 256GB kit is detected at 4800 MT/s with ECC active after installation?

Check the BIOS memory info screen or run dmidecode — it should show 256 GB total, 4800 MT/s speed, registered ECC type and CL40 latency for each of the 16 slots.

What exactly ships in the box and is anything else required to install the 16x16GB kit?

The box contains the 16 DDR5 4800 CL40 1.10V 288-pin ECC RDIMM modules only; no heat spreaders, cables or tools are included and none are required for installation.

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