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Four green DDR4 UDIMM sticks with black chips no heat spreader

NEMIX RAM

NEMIX RAM 128GB (4x32GB) DDR4 2666 ECC UDIMM CL19 1.2V

SKU CH-PV1B-6YQ42

A 128GB kit of four 32GB DDR4 2666 ECC UDIMM modules at CL19 and 1.2V for compatible servers and NAS systems

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • 128 GB total capacity from four 32 GB modules
  • ECC UDIMM detects and corrects single-bit errors for data integrity
  • DDR4 2666 CL19 timing delivers responsive server performance
  • Low 1.20 V operation reduces power draw and heat
  • 288-pin unbuffered design fits compatible NAS and workstation boards

Capacity and Compatibility

This kit delivers 128GB of DDR4 ECC UDIMM memory across four 32GB modules. It is built for servers, workstations and compatible NAS units such as the ASUS LOCKERSTOR that accept unbuffered DDR4 DIMMs. The 288-pin form factor fits standard DDR4 slots. Buyers who need registered or load-reduced modules cannot use this kit.

Speed and Headroom

Rated at DDR4 2666 (PC4-21300) with CL19 latency and 1.20V operation, the modules handle typical virtualization, file-serving and database workloads within the JEDEC standard. The dual-rank 2Rx8 organization provides density for multi-threaded tasks. Workloads that demand higher frequencies or lower latencies will exceed the rated specification of this memory.

DDR4 Platform Limits

The DDR4 interface tops out at the 2666 MT/s speed grade supplied here; faster DDR4 data rates are not supported by these modules. ECC error correction operates only on platforms that enable the feature in the memory controller. Systems limited to non-ECC or registered memory will not accept this unbuffered UDIMM kit.

How it compares

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

Price $921.99
Pricier than about 80% of the 6,523 comparable items (median $188.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $7.20 per GB
Typical for this category: the median of 6,064 items is $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 numberME21300-328K4
Total capacity128 GB (4 × 32 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 rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V

Questions about this item

Will this 128GB DDR4 2666 CL19 kit run alongside my existing DDR4 2666 ECC UDIMM modules?

Yes — all four sticks are DDR4 2666 (PC4-21300) CL19 1.20V 2Rx8 ECC UDIMM, so they will operate at the same speed, voltage and timings as identical-spec modules you already have.

How can I verify the 128GB DDR4 2666 ECC kit is working correctly after installation?

Enter the BIOS or UEFI and confirm the full 128GB is detected at 2666 MHz with ECC enabled; then run the operating system's built-in memory test to check for corrected errors.

What comes in the box with the 128GB (4x32GB) DDR4 2666 ECC UDIMM kit, and is anything else required?

The package contains four 32GB 288-pin DDR4 ECC UDIMM modules; no heat spreaders or extra cables are included, and no additional parts are needed for installation in a compatible system.

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