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Two green DDR4 ECC SODIMM sticks, 260-pin, no heat spreader

OWC

OWC 32GB (2×16GB) DDR4 2666 ECC SODIMM for Synology RS820+ / RS820RP+

SKU CH-WTC0-904P4

Adds 32 GB of DDR4 ECC SODIMM memory to Synology RS820+ and RS820RP+ NAS units

  • Capacity32GB (2 x 16GB)
  • Type260-Pin DDR4 ECC SODIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes

Capacity 32GB (2 x 16GB)

  • 32 GB total capacity lets you run more VMs and containers
  • ECC protection guards data integrity on RS820+ and RS820RP+
  • DDR4 2666 CL19 speed matches OEM specifications
  • 2 V unbuffered SODIMM drops in without extra cooling
  • Backward compatible with 2400 and 2133 MHz systems

Synology RS820+/RP+ memory upgrade

This 32GB kit contains two 16GB DDR4 ECC SODIMM modules validated for the Synology RackStation RS820+ and RS820RP+. The 260-pin unbuffered design matches the factory slots exactly, so the NAS recognises the full capacity without configuration changes. It targets administrators who need more headroom for virtual machines, containers or large file caches. Buyers whose chassis only accepts a single module cannot use this dual-stick kit.

Low-voltage ECC operation

Each module runs at 1.2V with a CL19 latency at 2666MHz, keeping power draw minimal inside the sealed rack chassis. ECC circuitry corrects single-bit errors on the fly, protecting data integrity during long uptime cycles. No heat spreader is fitted, relying on the system's directed airflow; acoustic impact is therefore unchanged from the stock configuration. Systems originally populated with 2400MHz or 2133MHz sticks will clock the new modules down automatically.

260-pin SODIMM form factor

The narrow circuit board slides into the RS820+/RP+ memory bays without tools, and the 2Rx8 organisation fills both rank channels per slot for optimal bandwidth. JEDEC and RoHS compliance means the upgrade does not void the Synology warranty. Builders who need registered DIMMs or modules with integrated heat spreaders for passive-cooled enclosures should look elsewhere, as this kit provides neither.

Highlights

  • 32 GB total capacity lets you run more VMs and containers
  • ECC protection guards data integrity on RS820+ and RS820RP+
  • DDR4 2666 CL19 speed matches OEM specifications
  • 2 V unbuffered SODIMM drops in without extra cooling
  • Backward compatible with 2400 and 2133 MHz systems

Specifications

BrandOWC
Part Number2C6D42R8032P
Capacity32GB (2 x 16GB)
Type260-Pin DDR4 ECC SODIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredUnbuffered
Rank2Rx8
Heat SpreaderNo
Compatible SystemSynology RackstationRS820+
Synology RackstationRS820RP+

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Questions about this item

How do I install the 260-pin DDR4 SODIMM modules in the RS820+ and what step is often missed?

Power off the NAS, remove the cover, insert each 16 GB module at an angle into the 260-pin slots until the clips click, then replace the cover before powering on.

What maintenance or replacement will this 32 GB ECC kit need later?

No scheduled maintenance is required; the modules are covered by a limited lifetime warranty and an advanced replacement programme if a fault ever occurs.

What limit appears first under sustained heavy workloads with these CL19 2666 MHz sticks?

The memory controller on the RS820+ caps the data rate at 2666 MHz, so bandwidth saturates before the CAS 19 latency becomes a bottleneck.

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