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Green circuit board SODIMM module with black memory chips and gold edge contacts

OWC

OWC 8GB DDR4 2666MHz CL19 ECC SODIMM 1Rx8 1.2V for Synology DS1819+ DS1821+

SKU CH-SZVN-386T6

An 8 GB DDR4 ECC SODIMM running at 2666 MHz CL19 for Synology DS1819+ and DS1821+ NAS units

  • Capacity8GB
  • Type260-Pin DDR4 ECC SODIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes

Capacity 8GB

  • 8GB capacity adds multitasking headroom for DS1819+ and DS1821+
  • DDR4 2666MHz CL19 speed matches NAS rated frequency
  • ECC protection detects and corrects single-bit data errors
  • 2V low voltage reduces power draw and heat
  • 260-pin SODIMM form factor fits Synology memory slots directly

OWC 8GB DDR4 2666MHz ECC SODIMM

This OWC module adds 8GB of DDR4 2666MHz ECC memory to compatible Synology DiskStation NAS units. It targets DS1819+ and DS1821+ owners who need more capacity for virtual machines, containers or large file caches. The single 260-pin SODIMM installs without tools and uses unbuffered ECC technology for data integrity. It is not for systems that require registered DIMMs or non-ECC memory.

JEDEC 1.2V operation keeps thermals low

The module runs at the standard 1.2V DDR4 voltage with CL19 latency, drawing minimal power inside the sealed NAS chassis. Passive cooling is sufficient because the stick has no heat spreader and generates little waste heat. Acoustic profile is unchanged since the NAS fan curve does not react to memory load. Backward compatibility with 2400MHz and 2133MHz buses lets the same DIMM work if the system downclocks.

Single-slot upgrade leaves room for expansion

The 1Rx8 rank layout occupies one SODIMM slot, freeing the second slot for a future matching module. Installation requires only opening the NAS drive bay cover and pressing the DIMM into the 260-pin socket. No BIOS configuration is needed; the firmware detects the ECC module automatically. Builders who need more than two slots or registered memory must choose a different platform.

Privalumai

  • 8GB capacity adds multitasking headroom for DS1819+ and DS1821+
  • DDR4 2666MHz CL19 speed matches NAS rated frequency
  • ECC protection detects and corrects single-bit data errors
  • 2V low voltage reduces power draw and heat
  • 260-pin SODIMM form factor fits Synology memory slots directly

Specifikacijos

BrandOWC
Part Number2C6D41R808GB
Capacity8GB
Type260-Pin DDR4 ECC SODIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredUnbuffered
Rank1Rx8
Heat SpreaderNo
Compatible SystemSynology DiskStationDS1819+
Synology DiskStationDS1821+

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How do I install this 260-pin DDR4 SODIMM in my Synology DS1819+ and which step is often missed?

Power off the NAS, unplug it, open the chassis, align the notch on the module with the slot key, press firmly until the side clips click shut, then replace the cover before powering on; the step most people miss is fully seating the module so both clips engage.

What maintenance or replacement will this ECC SODIMM need over time?

No scheduled maintenance is required; the module has no heat spreader or moving parts, so replacement is only necessary if a memory error appears or you decide to increase capacity beyond the current 8GB.

What limit appears first when this CL19 2666MHz module runs under sustained load in a DS1821+?

The CAS latency of CL19 at 2666MHz sets the access timing ceiling; sustained workloads will hit that latency boundary before the 1.2V power envelope or the JEDEC-rated speed becomes a bottleneck.

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