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Four green 288-pin DDR5 RDIMM modules in static bags

NEMIX RAM

NEMIX RAM RS720A-E12-RS12 128GB (4x32GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-WFA5-R688J MPN RS720A-E12-RS12

Four-module kit provides 128 GB of DDR5 4800 CL40 ECC registered memory for ASUS RS720A-E12-RS12 servers

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128 GB kit expands server capacity with four 32 GB modules
  • DDR5 4800 speed delivers high throughput for demanding workloads
  • ECC registered design protects data integrity in mission-critical systems
  • 1 V operation lowers power consumption for continuous use
  • Validated for ASUS RS720A-E12-RS12 dual-processor servers

ASUS Server Memory Kit

This 128GB kit contains four 32GB DDR5 RDIMM modules built for ASUS 2U dual-processor server model RS720A-E12-RS12. Each module runs at 4800MHz with CL40 latency and 1.1V operation. The registered ECC design targets data integrity in mission-critical workloads.

DDR5 4800 Registered ECC Limits

DDR5 4800 registered ECC memory requires a platform that supports RDIMM topology and the PC5-38400 data rate. Systems limited to UDIMM slots or lower DDR5 speeds cannot use this kit. Mixing with non-registered modules will prevent boot.

1Rx4 Rank Configuration Decides Fit

The 1Rx4 organisation determines electrical loading on the memory controller. Boards qualified for 1Rx4 at this capacity will run the full 128GB; platforms validated only for dual-rank or x8 configurations may not support the kit.

How it compares

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

Price $3,784.99
Pricier than about 76% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $29.57 per GB
Pricier than about 84% 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 numberMR38400-314K4
Total capacity128 GB (4 × 32 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 rank1Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASUS
In the box
Included items128 GB (4 × 32 GB) DDR5 4800 MHz PC5-38400 1Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Should I choose the 128 GB kit or a smaller capacity for my ASUS RS720A-E12-RS12?

The 128 GB kit provides four 32 GB modules and fills the supported slots for maximum memory density in this dual-processor server.

What does the DDR5 4800 CL40 rating deliver in the RS720A-E12-RS12?

The modules run at 4800 MT/s with CAS latency 40, giving the server its rated memory bandwidth for virtualisation and database workloads.

How does the 288-pin DDR5 RDIMM interface limit performance in this server?

The registered DDR5 RDIMM interface operates at 1.1 V and is electrically matched to the RS720A-E12-RS12 memory controller, so the kit runs at the platform's native 4800 MT/s speed.

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