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Eight green DDR5 RDIMM modules with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM RS520A-E12-RS24U 1TB (8×128GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-KBZM-7GW0D MPN RS520A-E12-RS24U

Eight registered DDR5 modules deliver 1 TB of ECC server memory at 4800 MT/s with CL40 latency

  • Total capacity1 TB (8 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 1TB capacity across eight 128GB modules for high-density server workloads
  • DDR5 4800 speed with CL40 latency delivers responsive registered memory performance
  • ECC registered design protects data integrity in mission-critical environments
  • 1V operation reduces power draw per module under sustained load
  • Validated for ASUS RS520A-E12-RS24U 2U server compatibility

System-specific DDR5 kit

This 1 TB kit contains eight 128 GB DDR5 4800 CL40 registered ECC RDIMMs built for the ASUS RS520A-E12-RS24U single-socket 2U server. It targets administrators who need maximum registered capacity in that exact platform.

1.1 V registered operation

Each module runs at 1.10 V with a 4Rx4 organisation, so the registered buffer absorbs electrical load instead of the CPU memory controller. The kit has no heat spreaders, relying on the server’s directed airflow to keep temperatures in check.

Eight-module population

Populating all twelve DIMM slots with this 8×128 GB kit delivers the full 1 TB capacity the motherboard supports. Buyers who need more than twelve modules or non-registered DIMMs must choose a different platform.

How it compares

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

Price $29,027.99
Pricier than about 93% of the 21,161 comparable items (median $397.99).
Total capacity 1 TB (8 × 128 GB)
Higher than about 93% of the 20,941 comparable items (median 32 GB).
Price per GB $29.03 per GB
Pricier than about 82% 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 numberMR38400-744K8
Total capacity1 TB (8 × 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 items1 TB (8 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

How do I install these 288-pin DDR5 RDIMM modules into the RS520A-E12-RS24U server?

Power down the server and open the chassis. Align each module's notch with the slot key and press firmly until both latches click. Follow the motherboard manual for the correct population order across the 12 or 24 slots.

What maintenance or replacement will the 1.1V ECC registered DIMMs need over time?

ECC corrects single-bit errors on the fly. If a module develops uncorrectable faults the system will log the event; replace the affected 128GB stick. No periodic maintenance is required beyond keeping airflow clear.

At what point does the CL40 4800 MT/s bandwidth limit appear under sustained load?

The 4Rx4 organisation and PC5-38400 rating set the peak throughput. Under continuous heavy traffic the memory controller hits this bandwidth ceiling before latency becomes the bottleneck.

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