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Green rectangular DDR5 RDIMM module with gold edge connectors and black chips no heat spreader

NEMIX RAM

NEMIX RAM RS520A-E12-RS12U 16GB DDR5 4800 CL40 1.1V ECC RDIMM memory upgrade

SKU CH-2XRT-VY6Z1 MPN RS520A-E12-RS12U

16 GB DDR5 4800 CL40 ECC registered DIMM at 1.1 V for ASUS RS520A-E12-RS12U servers

  • Total capacity16 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • ECC protection guards data integrity with registered DDR5 architecture
  • 4800 MT/s throughput handles demanding server workloads efficiently
  • 1 V operation reduces power draw in dense deployments
  • CL40 latency maintains responsive performance under load
  • Validated for ASUS RS520A-E12-RS12U 2U server compatibility

16 GB DDR5 4800 ECC RDIMM

This 16 GB module runs at DDR5 4800 with CL40 latency and 1.10 V operation. It uses a registered 288-pin RDIMM form factor with 1Rx8 organisation and on-die ECC. The stick is built for the ASUS RS520A-E12-RS12U single-socket 2U server.

Who this suits and who should look elsewhere

It fits administrators expanding memory in the named ASUS 2U server where registered ECC DDR5 is required. It will not work in desktops, laptops or consumer motherboards that accept only unbuffered non-ECC DIMMs. Buyers needing higher capacity per slot or lower latency should consider other modules.

Deciding specification — registered ECC DDR5

The module is a registered ECC DDR5 RDIMM, so the system must support registered error-correcting DDR5 memory. If the target platform requires unbuffered or non-ECC DDR5, this part will not be compatible.

How it compares

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

Price $429.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 16 GB
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $26.87 per GB
Pricier than about 74% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameNEMIX RAM
Product lineASUS Server Motherboard Compatible Series Memory
Model nameASUS DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-618K1
Total capacity16 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 items16 GB (1 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

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

Power down the server, open the chassis, align the module notch with the slot key, press firmly until the ejector tabs click, then verify in BIOS that the 16GB module is detected at 4800MT/s; the step often missed is ensuring the registered DIMM seats fully past the first click.

What maintenance or replacement will this ECC registered module need over its service life?

The module itself requires no scheduled maintenance; ECC corrects single-bit errors on the fly, but if uncorrectable errors accumulate the DIMM should be replaced — no heat spreader means airflow must stay unobstructed to avoid thermal throttling.

What limit appears first when this 1Rx8 CL40 1.1V module runs sustained workloads in the RS520A-E12-RS12U?

The memory controller’s maximum supported speed of 4800MT/s is the first ceiling; the module cannot exceed its rated PC5-38400 bandwidth, and latency stays at CL40 regardless of load duration.

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