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Eight green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM 128GB (8x16GB) DDR5 4800 CL40 ECC RDIMM memory upgrade for RS520A-E12-RS12U

SKU CH-KG50-4VSV9 MPN RS520A-E12-RS12U

128 GB DDR5 ECC registered server kit with eight 16 GB modules at 4800 MT/s CL40 1.1 V for ASUS RS520A-E12-RS12U

  • Total capacity128 GB (8 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128 GB total capacity across 8 modules
  • DDR5 4800 MT/s speed rated at PC5-38400
  • ECC registered design protects data integrity
  • 1 V operation reduces power draw
  • 288-pin RDIMM form factor fits compatible ASUS server

128 GB DDR5 ECC RDIMM kit

This kit provides 128 GB of DDR5 ECC registered memory in eight 16 GB modules. It runs at 4800 MT/s with a CAS latency of CL40 and operates at 1.1 V. The 288-pin RDIMMs are built for the ASUS RS520A-E12-RS12U server.

Suitable for single-socket 2U servers needing

Administrators expanding an ASUS RS520A-E12-RS12U to its full capacity will find the correct density and registration here. Builders requiring unbuffered UDIMMs, non-ECC modules or a different form factor cannot use this kit.

DDR5 4800 CL40 registered ECC

The decisive specification is DDR5 4800 with CL40 latency in a registered ECC RDIMM package. Only systems that accept this exact speed, latency and registration type will operate correctly with these modules.

How it compares

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

Price $3,645.99
Pricier than about 75% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (8 × 16 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $28.48 per GB
Pricier than about 80% 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 numberMR38400-618K8
Total capacity128 GB (8 × 16 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 rank1Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASUS
In the box
Included items128 GB (8 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Will the DDR5 ECC RDIMM modules require any periodic replacement or servicing?

The memory is a solid-state component with no moving parts and no scheduled service interval; it is designed to remain in the server for the system's operational life.

What limits sustained throughput when all eight DDR5 4800 slots are populated?

The memory controller runs each 1Rx8 module at 4800 MT/s with CL40 latency, so the platform's maximum memory bandwidth ceiling is reached before the DIMMs themselves become the bottleneck.

How much heat and power do the 128GB of registered DDR5 produce under continuous load?

Each 16GB RDIMM operates at 1.1V without a heat spreader; the registered buffer adds minimal overhead, so total power draw and thermal output stay within standard server cooling envelopes.

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