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Two green DDR4 SODIMM modules, black chips, no heat spreader, 260 pins

NEMIX RAM

NEMIX RAM 32GB (2x16GB) DDR4 2666 CL19 ECC SODIMM Synology DS723+

SKU CH-X0H0-XCYX9

32 GB dual-channel DDR4 ECC SODIMM kit at 2666 MHz CL19, validated for Synology DS723+

  • Capacity32GB (2 x 16GB)
  • SpeedDDR4 2666 (PC4 21300)
  • ECCYes
  • Buffered/RegisteredUnbuffered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.20V
  • 32 GB total capacity in a matched 2 × 16 GB kit
  • DDR4 2666 MHz speed rated at PC4‑21300 bandwidth
  • ECC unbuffered design detects and corrects single‑bit errors
  • Low 1.20 V operation reduces power draw and heat
  • Validated for Synology DiskStation DS723+ compatibility

32GB ECC SODIMM kit for Synology DS723+

This 32GB kit contains two 16GB DDR4 2666 SODIMM modules built for the Synology DiskStation DS723+. ECC unbuffered operation adds error correction for data integrity in NAS workloads. The 2Rx8 rank configuration matches the platform requirements. CL19 latency and 1.20V voltage follow the JEDEC PC4-21300 standard.

260-pin unbuffered modules without heat spreaders

Each module uses a 260-pin DDR4 SODIMM edge connector that seats directly in the DS723+ memory slots. Major OEM chips from Samsung, Micron or Hynix are used depending on supply. The unbuffered design keeps latency low for the NAS CPU. No heat spreader is fitted, so the modules fit the tight clearance inside the DiskStation chassis.

Verify your DS723+ has two free SODIMM slots

Before ordering, confirm the DiskStation DS723+ has two available 260-pin DDR4 SODIMM sockets and supports 32GB total capacity. The system must accept ECC unbuffered DDR4 2666 modules at 1.20V. Check the Synology hardware guide for the maximum supported memory per slot and the approved rank configuration.

Points forts

  • 32 GB total capacity in a matched 2 × 16 GB kit
  • DDR4 2666 MHz speed rated at PC4‑21300 bandwidth
  • ECC unbuffered design detects and corrects single‑bit errors
  • Low 1.20 V operation reduces power draw and heat
  • Validated for Synology DiskStation DS723+ compatibility

Caractéristiques

BrandNEMIX RAM
SeriesSynology Compatible Series NAS Memory
ModelSynology DDR4 2666MHZ ECC Unbuffered SODIMM
Part NumberMSE21300-628K2
Capacity32GB (2 x 16GB)
SpeedDDR4 2666 (PC4 21300)
ECCYes
Buffered/RegisteredUnbuffered
ChipsetMajor OEM Samsung, Micron, Hynix
Voltage1.20V
Compatible SystemSynology
CAS LatencyCL19
Heat SpreaderNo
Type260-PIN DDR4 ECC SODIMM
Rank2Rx8
FeaturesDDR4 ECC Unbuffered SODIMM Motherboard Compatible
Package Content32GB (2X16GB) DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM KIT

Questions sur cet article

What does the DDR4 2666 PC4-21300 rating cap in practice?

The kit runs at 2666 MT/s with CL19 latency; the memory controller in the Synology DS723+ will not exceed this speed.

What physical slot and pin count does this 260-pin SODIMM need?

It fits a standard 260-pin DDR4 SODIMM socket; the DS723+ has two such slots for the 2x16 GB modules.

How do you install the modules and what step is often missed?

Power off the NAS, open the chassis, align the notch on each 260-pin module, press firmly until the side clips click, then reassemble before powering on.

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