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Two green DDR5 RDIMM modules with black chips no heat spreader 288 pin

NEMIX RAM

NEMIX RAM RS720A-E12-RS12 256GB (2x128GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-MSWA-YCR68 MPN RS720A-E12-RS12

256 GB dual-module DDR5 kit with ECC and registered buffering for ASUS dual-processor servers

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256GB total capacity for high-density server workloads
  • Dual 128GB modules populate two DIMM slots
  • DDR5 4800 speed delivers 38400 MT/s bandwidth
  • ECC registered design corrects errors in mission-critical tasks
  • 1V operation reduces power draw under load

Suited for dual-processor servers

This 256 GB kit targets administrators upgrading the ASUS RS720A-E12-RS12 platform with registered ECC memory. The 4800 MT/s DDR5 modules operate at 1.10 V and provide error correction for mission-critical workloads. Builders needing unbuffered DIMMs or non-ECC memory for workstations should look elsewhere.

Deciding specification

The 4Rx4 rank organisation combined with registered ECC RDIMM signalling is the single attribute that determines compatibility with the ASUS RS720A-E12-RS12 server. Only modules matching this exact configuration will initialise correctly in the dual-processor motherboard.

How it compares

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

Price $8,052.99
Pricier than about 84% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $31.46 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 numberMR38400-744K2
Total capacity256 GB (2 × 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 items256 GB (2 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Do I need an ASUS RS720A-E12-RS12 dual-processor server with DDR5 RDIMM slots to install this 256 GB kit?

Yes. The kit is built for the ASUS RS720A-E12-RS12 platform and uses 288-pin DDR5 RDIMMs, so the server must provide DDR5 registered DIMM sockets.

Will the 4Rx4 organisation and CL40 timing of these modules match the memory controller on the RS720A-E12-RS12?

The modules are qualified for that server model, so the 4Rx4 layout and CL40 latency are supported by its DDR5 memory controller.

How can I confirm the kit is running at DDR5 4800 with ECC active after installation?

Check the system BIOS or an OS tool such as dmidecode; it should report 4800 MT/s, CL40, 1.10 V and ECC enabled for each 128 GB module.

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