We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Four green DDR4 UDIMM sticks, no heat spreaders, 288-pin gold contacts

NEMIX RAM

NEMIX RAM 64GB (4x16GB) DDR4 2666 CL19 ECC UDIMM 1.2V 288-pin

SKU CH-5B2K-MMX7P

Four 16 GB DDR4 2666 CL19 ECC UDIMM modules totalling 64 GB at 1.2 V for compatible ASUS Lockerstor NAS systems

  • Capacity64GB (4 x 16GB)
  • Type288-Pin DDR4 ECC UDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.20V
  • ECCYes
  • 64GB kit with four 16GB modules for high-density server memory
  • DDR4 2666 CL19 at 1.2V balances speed and power efficiency
  • ECC unbuffered UDIMM detects and corrects single-bit errors automatically
  • 288-pin DDR4 form factor fits standard server and NAS motherboard slots
  • Built with major OEM Samsung, Micron or Hynix chips for reliability

64 GB ECC UDIMM kit for NAS servers

This NEMIX RAM kit provides 64 GB of DDR4 ECC unbuffered memory in a matched set of four 16 GB modules. It runs at 2666 MHz with CL19 latency at 1.2 V. The modules use 288-pin UDIMM form factor and are built with major OEM DRAM chips.

Suited for ASUS Lockerstor NAS upgrades.

The kit is designed for compatibility with ASUS Lockerstor AS-16GECD4-U NAS units and similar systems that accept unbuffered ECC UDIMMs. Builders whose motherboards require registered or load-reduced DIMMs cannot use this memory. Systems needing higher densities per slot or non-ECC modules should consider other configurations.

2666 MHz DDR4 speed rating

The decisive specification is the DDR4 2666 (PC4-21300) speed grade. A motherboard or NAS that only supports lower DDR4 frequencies will still run the modules, but at the slower supported rate. Verify that your platform accepts unbuffered ECC UDIMMs at this speed before purchase.

Highlights

  • 64GB kit with four 16GB modules for high-density server memory
  • DDR4 2666 CL19 at 1.2V balances speed and power efficiency
  • ECC unbuffered UDIMM detects and corrects single-bit errors automatically
  • 288-pin DDR4 form factor fits standard server and NAS motherboard slots
  • Built with major OEM Samsung, Micron or Hynix chips for reliability

Specifications

BrandNEMIX RAM
SeriesASUS LOCKERSTOR NAS Memory
ModelASUS LOCKERSTOR NAS Memory
Part NumberME21300-618K4
Capacity64GB (4 x 16GB)
Type288-Pin DDR4 ECC UDIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.20V
ECCYes
Buffered/RegisteredUnbuffered
Rank1Rx8
ChipsetMajor OEM Samsung, Micron, Hynix
Heat SpreaderNo
FeaturesDDR4 ECC Unbuffered UDIMM Motherboard Compatible

Questions about this item

What motherboard slot does this 288-pin DDR4 kit require?

A standard 288-pin DDR4 DIMM slot running at 1.20 V is required for each of the four 16 GB modules.

Will this CL19 DDR4-2666 kit run with slower DDR4 modules I already own?

The kit operates at 2666 MT/s CL19; the motherboard will clock all installed DDR4 down to the slowest module’s speed and loosest timings.

How can I confirm the ECC function is active after installing the 4x16 GB kit?

Check the BIOS memory information page — it should show 64 GB total with ECC enabled, and the OS should report correctable error counters.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.