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Two green DDR4 UDIMM modules, no heat spreaders, 288-pin edge connectors

NEMIX RAM

NEMIX RAM 32GB (2x16GB) DDR4 2666 ECC UDIMM CL19 1.20V 288-Pin ASUS LOCKERSTOR NAS Memory

SKU CH-9ASR-4DJBQ

A 32GB dual-channel DDR4 2666 ECC UDIMM kit with CL19 timing and 1.20V operation for ASUS LOCKERSTOR NAS systems

  • Total capacity32 GB (2 × 16 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 NAS workloads
  • 32GB kit (2×16GB) expands ASUS Lockerstor capacity
  • DDR4 2666 CL19 at 1.20V matches system specs
  • Unbuffered 288-pin UDIMM fits compatible NAS slots
  • Major OEM chips (Samsung, Micron, Hynix) ensure reliability

32 GB DDR4 ECC UDIMM kit

This NEMIX RAM kit supplies 32 GB across two 16 GB DDR4 2666 ECC unbuffered UDIMM modules. It runs at CL19 latency with a 1.20 V operating voltage and uses 288-pin connectors. The kit is validated for ASUS LOCKERSTOR NAS devices and built with major OEM DRAM chips.

Who this suits and who it does not

This kit suits administrators upgrading compatible ASUS LOCKERSTOR NAS units that require DDR4 ECC unbuffered memory. It is not for systems that only accept registered or load-reduced DIMMs. Buyers needing non-ECC modules or a different DDR generation should look elsewhere.

DDR4 2666 ECC unbuffered specification

The decisive specification is the DDR4 2666 ECC unbuffered UDIMM format with CL19 timing. Verify that the target NAS or server platform supports this exact speed, voltage and module type before purchase.

How it compares

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

Price $252.99
Pricier than about 56% of the 6,523 comparable items (median $188.99).
Total capacity 32 GB (2 × 16 GB)
Typical for this category: the median of 6,064 items is 32 GB.
Price per GB $7.91 per GB
Pricier than about 56% of the 6,064 comparable items (median $7.25 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 LOCKERSTOR NAS Memory
Model nameASUS LOCKERSTOR NAS Memory
Part numberME21300-618K2
Total capacity32 GB (2 × 16 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

Will the 2666 speed run at its rated frequency in my ASUS Lockerstor NAS?

The modules are rated DDR4 2666 PC4-21300 and will operate at that speed provided the NAS memory controller supports 2666 MT/s.

Does the ECC UDIMM interface require a registered DIMM slot or a specific chipset?

These are unbuffered ECC UDIMMs, so they need a standard 288-pin DDR4 slot that accepts unbuffered ECC memory, not a registered DIMM slot.

Will the two 16 GB sticks fit side-by-side in the Lockerstor chassis without a heat spreader?

Each module is a standard-height 288-pin DDR4 UDIMM without a heat spreader, so they occupy the normal DIMM footprint and clear adjacent slots.

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