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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

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeUnbuffered
  • Rated voltage1.2 V
  • 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.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $554.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 64 GB (4 × 16 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $8.67 per GB
Typical for this category: the median of 20,941 items is $8.19 per GB.

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Specifications

Product
Brand nameNEMIX RAM
Product lineSynology Compatible Series NAS Memory
Model nameSynology DDR4 2666 MHz ECC Unbuffered UDIMM
Part numberME21300-628K4
Total capacity64 GB (4 × 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
Heat spreaderNo
Memory rank2Rx8
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSynology
In the box
Included items64 GB (4 × 16 GB) DDR4 2666 MHz PC4-21300 2Rx8 1.2 V 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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