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Single green DDR5 RDIMM module, 288 pins, no heat spreader, 128GB capacity

NEMIX RAM

NEMIX RAM RS520A-E12-RS12U 128GB DDR5 4800 CL40 1.1V 4Rx4 ECC RDIMM memory upgrade

SKU CH-3XEY-1DN1G MPN RS520A-E12-RS12U

128 GB DDR5 4800 ECC registered RDIMM with CL40 latency and 1.1 V operation for ASUS RS520A-E12-RS12U servers

  • Total capacity128 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128GB DDR5 capacity handles demanding server workloads
  • 4800MHz speed delivers high-throughput data processing
  • ECC registered design ensures data integrity under load
  • 1V operation reduces power draw in dense configurations
  • Validated for ASUS RS520A-E12-RS12U 2U server compatibility

Server DDR5 ECC RDIMM

This 128GB DDR5 module is built for the ASUS RS520A-E12-RS12U single-socket 2U server. It delivers registered ECC memory for IT professionals who need reliable capacity in a mission-critical environment.

4Rx4 registered organisation

The module uses a 4Rx4 configuration with CL40 latency at 4800 MT/s. This specific rank and buffer arrangement is the single specification that determines whether the server will recognise and stabilise the full 128GB capacity.

Single-module upgrade kit

The package contains one 288-pin RDIMM running at 1.10V with Samsung, Micron or Hynix chips. No heat spreader is included, so airflow in the 2U chassis must handle thermal management directly.

How it compares

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

Price $3,536.99
Pricier than about 75% 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 $27.63 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 numberMR38400-744K1
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

What does the 4800 speed rating mean when the module is installed in an ASUS RS520A-E12-RS12U server?

The module runs at DDR5 4800 MT/s, delivering PC5-38400 bandwidth in the server's memory controller.

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

The registered DDR5 interface caps the module at 4800 MT/s and requires the server's memory controller to support ECC registered DIMMs.

Will the 4Rx4 128 GB stick fit the memory slots in an ASUS RS520A-E12-RS12U 2U chassis?

Yes, the 288-pin DDR5 RDIMM form factor matches the server's DIMM slots and the single-module design occupies one slot.

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