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Eight green DDR4 RDIMM sticks in anti-static tray

NEMIX RAM

NEMIX RAM 128GB (8x16GB) DDR4 2666 ECC RDIMM Synology Compatible memory upgrade

SKU CH-GZB5-WHHJ3

Eight 16 GB DDR4 2666 ECC RDIMM modules totalling 128 GB, CL19 at 1.2 V, built for Synology NAS compatibility

  • Capacity128GB (8 x 16GB)
  • SpeedDDR4 2666 (PC4 21300)
  • ECCYes
  • Buffered/RegisteredRegistered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.20V
  • 128 GB total capacity across eight 16 GB modules
  • ECC registered design detects and corrects single-bit errors
  • DDR4-2666 speed with CL19 timing for responsive NAS operation
  • 2 V low-voltage modules reduce power draw and heat
  • Validated for Synology D4RD-2666-16G compatibility

Synology NAS 128GB DDR4 Kit

This 128GB kit contains eight 16GB DDR4 2666 registered ECC modules built for Synology NAS systems. It targets administrators who need maximum supported capacity for virtualisation, heavy file services or database workloads on compatible Synology platforms.

Thermals and Power at 1.2V

Each module runs at 1.20V with no heat spreader, relying on the NAS chassis airflow for cooling. Registered buffering and ECC add minimal latency while keeping power draw low during sustained 2666 MT/s operation.

What the Kit Changes

The eight-module population fills every slot on supported Synology models, eliminating mixed-capacity configurations and delivering the full 128GB in a single validated kit. No additional software or accessories are included.

Highlights

  • 128 GB total capacity across eight 16 GB modules
  • ECC registered design detects and corrects single-bit errors
  • DDR4-2666 speed with CL19 timing for responsive NAS operation
  • 2 V low-voltage modules reduce power draw and heat
  • Validated for Synology D4RD-2666-16G compatibility

Specifications

BrandNEMIX RAM
SeriesSynology Compatible Series NAS Memory
ModelSynology DDR4 2666MHZ ECC RDIMM Registered Server Memory
Part NumberMR21300-614K8
Capacity128GB (8 x 16GB)
SpeedDDR4 2666 (PC4 21300)
ECCYes
Buffered/RegisteredRegistered
ChipsetMajor OEM Samsung, Micron, Hynix
Voltage1.20V
Compatible SystemSynology
CAS LatencyCL19
Heat SpreaderNo
Type288-Pin DDR4 RDIMM
Rank1Rx4
FeaturesDDR4 ECC Registered RDIMM Server Motherboard Compatible
Package Content128GB (8X16GB) DDR4 2666MHZ PC4-21300 1Rx4 1.2V CL19 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

How do I install the 288-pin DDR4 RDIMM modules in my Synology NAS, and what step is often missed?

Power off the NAS, open the chassis, align each module's notch with the slot key, press firmly until the side clips click, then verify all eight 16GB sticks are recognised in DSM before closing the case.

Will the ECC registered memory need any firmware updates or component swaps over its service life?

The modules themselves require no firmware updates or scheduled part replacements; ECC error correction runs in hardware and the registered buffer is passive, so the kit operates maintenance-free unless a stick fails.

At what point does the CL19 latency at 2666 MT/s become the bottleneck during sustained workloads?

Under continuous heavy traffic the CAS 19 timing at 2666 MT/s limits random-access throughput before the 1.2 V power envelope or the registered buffer saturates.

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