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Green rectangular DDR5 RDIMM circuit board with gold edge connectors and black memory chips, no heat spreader

NEMIX RAM

NEMIX RAM RS720A-E12-RS24U 128GB DDR5 4800 CL40 4Rx4 1.1V ECC RDIMM memory upgrade

SKU CH-JXQB-542R4 MPN RS720A-E12-RS24U

128GB DDR5 4800 ECC registered RDIMM, CL40, 1.1V, 4Rx4, for ASUS RS720A-E12-RS24U server

  • 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 capacity for heavy server workloads
  • CL40 CAS latency tuned for registered ECC stability
  • 1 V operating voltage reduces power draw per module
  • 4Rx4 quad-rank organisation maximises density per slot
  • 288-pin RDIMM form factor fits ASUS RS720A-E12-RS24U servers

128GB DDR5 4800 ECC RDIMM module

This 128GB DDR5 4800 ECC registered DIMM delivers 4Rx4 organisation at 1.1V with CL40 latency. It is built for the ASUS RS720A-E12-RS24U 2U dual-processor server and uses major OEM Samsung, Micron or Hynix chips. The 288-pin form factor fits the platform's registered memory slots.

Server builders needing registered ECC DDR5

This module suits administrators upgrading or repairing the named ASUS 2U server where registered ECC DDR5 is required. It is not for workstations or desktops that accept only unbuffered non-ECC memory. Buyers who need a different capacity, speed or rank configuration should look at another part.

128GB single-module capacity

The kit provides 128GB in a single 288-pin RDIMM, so the server's total memory scales by 128GB per occupied slot. Verify the platform's maximum supported capacity per slot and total 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 $4,166.99
Pricier than about 77% 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 $32.55 per GB
Pricier than about 90% 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

How can I verify the 128GB DDR5 4800 module is running at CL40 1.1V after installation?

Enter the server BIOS or use a hardware monitoring utility to confirm the memory speed reads 4800 MT/s, CAS latency shows CL40, and the voltage reports 1.1V for the installed RDIMM.

What ships in the box and do I need extra parts for the ASUS RS720A-E12-RS24U server?

The package contains one 128GB 288-pin DDR5 ECC RDIMM; no additional cables, brackets or heat spreaders are required for this registered server memory upgrade.

Which capacity and rank option matches the RS720A-E12-RS24U motherboard specifications?

Choose the single 128GB 4Rx4 module listed as MR38400-744K1; it is the exact density and rank configuration validated for this ASUS dual-processor server model.

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