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Two green 288-pin DDR5 RDIMM modules without heat spreaders

NEMIX RAM

NEMIX RAM RS720A-E12-RS12 128GB (2x64GB) DDR5 4800 CL40 2Rx4 ECC RDIMM memory upgrade

SKU CH-KTW0-C7XTW MPN RS720A-E12-RS12

128GB DDR5 4800 ECC registered server memory kit with two 64GB modules at CL40 and 1.1V for ASUS RS720A-E12-RS12

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128GB kit with two 64GB modules for high-density server memory
  • DDR5 4800 speed delivers PC5-38400 bandwidth for demanding workloads
  • ECC registered RDIMM ensures data integrity in mission-critical environments
  • 1V operation reduces power draw at full 128GB capacity
  • Validated for ASUS RS720A-E12-RS12 2U dual-processor server compatibility

Compatibility & use

This 128GB kit is built for the ASUS RS720A-E12-RS12 2U dual-processor server. Registered ECC DDR5 modules provide error correction and signal integrity required by multi-socket platforms. IT teams managing virtualisation hosts or database clusters will appreciate the validated compatibility. Workstations or desktop boards that accept only unbuffered memory cannot use these modules.

Deciding specification

The registered ECC RDIMM form factor is the single attribute that determines fit. Only systems designed for registered DDR5 memory with ECC support will recognise and stabilise this kit. Buyers must confirm their motherboard explicitly lists RDIMM support before purchasing.

How it compares

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

Price $3,546.99
Pricier than about 75% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (2 × 64 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $27.71 per GB
Pricier than about 77% 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 numberMR38400-924K2
Total capacity128 GB (2 × 64 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 rank2Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASUS
In the box
Included items128 GB (2 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Will the 288-pin DDR5 RDIMM modules fit the memory slots on an ASUS RS720A-E12-RS12 server?

Yes, the kit contains two 64 GB modules built to the 288-pin DDR5 RDIMM form factor that matches the server's DIMM slots.

What is the correct way to install the two 64 GB sticks so the server recognises the full 128 GB?

Populate the two modules in the same channel pair as shown in the ASUS RS720A-E12-RS12 manual; the common mistake is placing them in mismatched channels, which prevents the system from seeing the full capacity.

When should the ECC RDIMM kit be replaced to keep the ASUS server running reliably?

Replace the modules if the server logs uncorrectable ECC errors or fails memory diagnostics, since the registered ECC design is built for continuous operation and has no scheduled service interval.

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