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Green bare circuit board DDR5 RDIMM module 288 pins 128GB

NEMIX RAM

NEMIX RAM RS720-E11-RS12U 128GB DDR5 4800 CL40 1.1V 4Rx4 ECC RDIMM memory upgrade

SKU CH-DKDF-VHP4M MPN RS720-E11-RS12U

128GB DDR5 4800 CL40 ECC registered RDIMM for ASUS RS720-E11-RS12U servers

  • Total capacity128 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128 GB DDR5 4800 MHz ECC RDIMM for high-capacity server workloads
  • Registered 4Rx4 architecture delivers signal integrity at 1.1 V
  • CL40 latency supports responsive data access under load
  • 288-pin DDR5 form factor fits ASUS RS720-E11-RS12U server
  • Major OEM chips tested under stress for mission-critical reliability

ASUS 2U dual-socket server upgrade

This 128 GB DDR5 4800 RDIMM is built for the ASUS RS720-E11-RS12U platform. It delivers registered ECC operation at 1.1 V with CL40 latency. The single-module design fills one 288-pin slot with 4Rx4 density. IT teams can add maximum capacity per channel without mixing kits.

Suited for capacity-bound workloads.

Virtualisation hosts, database nodes and compute clusters that need the full 128 GB per DIMM will benefit. Systems that require unbuffered UDIMMs, non-ECC memory or lower-density modules cannot use this part. Buyers needing multiple smaller DIMMs for channel balancing should look at alternative configurations.

128 GB 4Rx4 registered ECC at DDR5 4800

The 4Rx4 organisation and registered buffer let the motherboard address the full 128 GB in a single slot. ECC corrects single-bit errors for data integrity under sustained load. The 1.1 V operating voltage matches the DDR5 server standard. Verify the RS720-E11-RS12U memory population rules before ordering.

How it compares

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

Price $3,962.99
Pricier than about 76% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $30.96 per GB
Pricier than about 89% 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 numberMR38400-744K1
Total capacity128 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 items128 GB (1 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

Will the 1.1 V DDR5 DIMMs hit a thermal limit before the server chassis airflow can keep them stable?

These modules run at the standard 1.1 V DDR5 voltage with no heat spreader, so sustained stability depends on the ASUS RS720-E11-RS12U chassis fans moving enough air across the bare DRAM.

What acoustic or thermal load does a full bank of 4Rx4 registered ECC DIMMs add to an ASUS RS720-E11-RS12U running continuously?

Registered 4Rx4 DDR5-4800 modules draw slightly more power than unbuffered DIMMs, increasing the memory subsystem heat that the 2U server fans must exhaust; no separate fan or liquid loop is required.

Which ASUS server motherboard and firmware revision must already be installed for this 128 GB DDR5-4800 RDIMM to initialise?

The kit is validated for the ASUS 2U dual-socket platform RS720-E11-RS12U; the board must support DDR5-4800 registered ECC memory and have a BIOS version that enables 4Rx4 128 GB modules.

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