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Four green DDR4 UDIMM sticks in a kit

NEMIX RAM

NEMIX RAM 64GB (4×16GB) DDR4 2666 PC4-21300 ECC UDIMM Synology RS1619xs+ memory upgrade

SKU CH-HRPG-97QWS

64 GB kit of four 16 GB DDR4 2666 ECC UDIMM modules at 1.2 V, CL19, 288-pin, validated for Synology RS1619xs+ NAS

  • Capacity64GB (4 x 16GB)
  • SpeedDDR4 2666 (PC4 21300)
  • ECCYes
  • Buffered/RegisteredUnbuffered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.20V
  • 64 GB total capacity across four 16 GB modules
  • DDR4 2666 speed rated PC4-21300 for Synology RS1619xs+
  • ECC unbuffered design protects data integrity in NAS workloads
  • 2 V low-voltage operation at CL19 latency
  • 288-pin 2Rx8 UDIMM kit built with major OEM chips

Synology RS1619xs+ 64GB DDR4 ECC kit

This NEMIX RAM kit supplies 64GB of DDR4 2666 memory across four 16GB unbuffered ECC UDIMM modules. It is built for the Synology RackStation RS1619xs+ NAS and uses standard 288-pin DDR4 form factor. The modules operate at 1.2V with CL19 timing and 2Rx8 organisation.

ECC unbuffered DDR4 2666 for RS1619xs+

The decisive specification is ECC unbuffered DDR4 2666 (PC4-21300) in a 288-pin UDIMM package. The RS1619xs+ requires this exact combination of error correction, voltage and speed; registered or non-ECC modules will not work in this system.

Four-slot population frees no additional bays

Installing the four 16GB modules occupies every memory slot on the RS1619xs+, delivering the full 64GB capacity in a single step. No further memory expansion is possible without removing modules, so the kit suits buyers who want the maximum supported configuration immediately.

Highlights

  • 64 GB total capacity across four 16 GB modules
  • DDR4 2666 speed rated PC4-21300 for Synology RS1619xs+
  • ECC unbuffered design protects data integrity in NAS workloads
  • 2 V low-voltage operation at CL19 latency
  • 288-pin 2Rx8 UDIMM kit built with major OEM chips

Specifications

BrandNEMIX RAM
SeriesSynology Compatible Series NAS Memory
ModelSynology DDR4 2666MHZ ECC Unbuffered UDIMM
Part NumberME21300-628K4
Capacity64GB (4 x 16GB)
SpeedDDR4 2666 (PC4 21300)
ECCYes
Buffered/RegisteredUnbuffered
ChipsetMajor OEM Samsung, Micron, Hynix
Voltage1.20V
Compatible SystemSynology
CAS LatencyCL19
Heat SpreaderNo
Type288-Pin DDR4 ECC UDIMM
Rank2Rx8
FeaturesDDR4 ECC Unbuffered UDIMM Motherboard Compatible
Package Content64GB (4X16GB) DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 288-PIN ECC Unbuffered UDIMM KIT

Questions about this item

What does the 2666 MHz speed mean once the kit is installed in a Synology RS1619xs+?

The memory runs at DDR4 2666 (PC4-21300) with CL19 latency, delivering the rated throughput the NAS platform expects for this configuration.

How does the 288-pin DDR4 ECC UDIMM interface limit what the modules can do in practice?

The unbuffered 288-pin DDR4 ECC UDIMM form factor fits the RS1619xs+ memory slots and provides error-correcting code support without registered buffering.

What physical space and power do the four 16 GB sticks need to fit and run?

Each 16 GB module is a standard-height 288-pin UDIMM without a heat spreader, operates at 1.20 V, and the kit occupies four DIMM slots.

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