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Green bare circuit board memory module with gold edge connector and black chips

NEMIX RAM

NEMIX RAM 16GB DDR4 2666 ECC UDIMM CL19 1.2V 288-Pin ASUS LOCKERSTOR NAS Memory

SKU CH-Y486-A4DW1

16 GB DDR4-2666 ECC UDIMM module with CL19 latency and 1.2 V operation for ASUS Lockerstor NAS

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • ECC protection prevents data corruption in critical NAS workloads
  • 2666 MHz DDR4 speed matches ASUS Lockerstor specifications
  • 2 V operation reduces power draw and heat
  • 1Rx8 single-rank layout ensures broad motherboard compatibility
  • 288-pin UDIMM form factor fits standard DDR4 slots

16GB DDR4 2666 ECC UDIMM for ASUS LOCKERSTOR NAS

This NEMIX RAM module provides 16GB of DDR4 2666 memory in a single 288-pin UDIMM. It operates at CL19 latency with a 1.20V voltage. The unbuffered ECC design uses a 1Rx8 configuration built with major OEM chips.

Suits ASUS LOCKERSTOR NAS owners adding ECC capacity

Buyers who need registered DIMMs or a heat spreader should look elsewhere. Systems requiring speeds above 2666MT/s or lower CAS latency than CL19 are not supported by this module. Non-ECC platforms cannot use the error-correction feature.

ECC unbuffered UDIMM decides compatibility

The module is an unbuffered ECC UDIMM, so it only works in platforms that accept that exact memory type. Buffered or registered memory slots will not accept it. Verify your NAS or motherboard specifies unbuffered ECC UDIMM support before purchase.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $129.99
Cheaper than about 59% of the 6,523 comparable items (median $188.99).
Total capacity 16 GB
Lower than about 60% of the 6,064 comparable items (median 32 GB).
Price per GB $8.12 per GB
Pricier than about 58% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineASUS LOCKERSTOR NAS Memory
Model nameASUS LOCKERSTOR NAS Memory
Part numberME21300-618K1
Total capacity16 GB
Product type288-Pin DDR4 ECC UDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL19
ECC supportYes
Buffer typeUnbuffered
Memory rank1Rx8
Heat spreaderNo
Power
Rated voltage1.2 V

Questions about this item

How do I install this 288-pin DDR4 ECC UDIMM in my ASUS LOCKERSTOR NAS and what step is often missed?

Power off the NAS, open the chassis, align the notch on the 288-pin module with the slot key, press firmly until the retention clips click, then power on and verify the 16GB capacity in the system BIOS or DSM info page — the step often missed is confirming the module shows at the rated 2666 speed.

What maintenance or replacement will this 1Rx8 ECC UDIMM need over time?

No routine maintenance is required; ECC corrects single-bit errors automatically, but if the NAS logs uncorrectable memory errors or fails to boot, the 16GB stick should be replaced.

What limit appears first when this CL19 1.2V module runs sustained workloads?

The CAS latency of CL19 at 2666 MT/s sets the access timing ceiling, and the fixed 1.20V operating voltage limits headroom for extended heavy use.

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