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Four green DDR5 RDIMM modules without heat spreaders

NEMIX RAM

NEMIX RAM RS520A-E12-RS12U 64GB (4x16GB) DDR5 4800 ECC RDIMM memory upgrade

SKU CH-TNQR-KMM4B MPN RS520A-E12-RS12U

64GB kit of four 16GB DDR5 4800 ECC registered DIMMs for ASUS RS520A-E12-RS12U servers

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 64 GB total capacity for demanding server workloads
  • DDR5 4800 speed with PC5-38400 bandwidth for fast data throughput
  • ECC registered RDIMM design protects data integrity in mission-critical environments
  • 1 V low-voltage operation reduces power draw per module
  • 288-pin 1Rx8 configuration validated for ASUS RS520A-E12-RS12U 2U server

64 GB DDR5 4800 ECC RDIMM kit

This 64 GB kit contains four 16 GB DDR5 4800 ECC registered DIMMs built for the ASUS RS520A-E12-RS12U single-socket 2U server. Each module runs at 1.1 V with CL40 latency and a 1Rx8 organisation. The registered design adds a buffer that helps the memory controller maintain signal integrity across all four slots.

Compatibility and limits

The kit is validated only for the ASUS RS520A-E12-RS12U server; it will not fit desktop motherboards or laptops that require unbuffered UDIMMs. Systems needing more than 64 GB or a different speed grade should look for another qualified kit. Workstations that do not support ECC registered memory cannot use these modules.

DDR5 4800 registered ECC specification

The decisive specification is DDR5 4800 registered ECC with a 288-pin RDIMM form factor. Only platforms that explicitly support DDR5 registered ECC at this speed and voltage will recognise the full 64 GB capacity.

How it compares

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

Price $1,801.99
Pricier than about 67% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (4 × 16 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $28.16 per GB
Pricier than about 79% 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 numberMR38400-618K4
Total capacity64 GB (4 × 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 items64 GB (4 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

How do I install the 288-pin DDR5 RDIMM modules in the ASUS RS520A-E12-RS12U server, and what step is often missed?

Power down the server, open the chassis, align each module's notch with the slot key, press firmly until the retention clips click shut, then verify all four 16 GB modules are recognised in the BIOS before closing the case.

What maintenance or replacement will the 64 GB DDR5 4800 ECC RDIMM kit need during its service life?

The modules have no heat spreaders and no moving parts, so no routine maintenance is required; replacement is only necessary if a module fails, which is covered by the manufacturer's lifetime replacement warranty.

What limit appears first when the 1Rx8 CL40 1.1 V registered DIMMs run sustained workloads in the RS520A-E12-RS12U?

The registered buffer and ECC logic add latency, so memory bandwidth and latency ceilings are reached before thermal limits, especially with four ranks populating all channels at 4800 MT/s.

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