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Green rectangular circuit board with black memory chips and gold edge contacts

OWC

OWC 8GB DDR4 2666 CL19 2Rx8 260-pin 1.2V Non-ECC SODIMM memory upgrade

SKU CH-C71D-G5EA9

An 8 GB DDR4 SODIMM running at 2666 MHz CL19, validated for Synology DiskStation DS220+, DS420+, DS423+, DS720+ and DS920+

  • Capacity8GB
  • Type260-Pin DDR4 Non-ECC SODIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCNo
  • Boosts Synology NAS responsiveness with 8 GB DDR4 2666 MHz module
  • JEDEC-standard 1.2 V design ensures warranty-safe upgrade
  • CL19 latency and 2Rx8 organisation deliver stable multitasking
  • Backward compatible with 2400 MHz and 2133 MHz systems
  • Fits DS220+, DS420+, DS423+, DS720+ and DS920+ DiskStations

Synology NAS memory upgrade

This 8 GB DDR4 SODIMM is built for Synology DiskStation DS220+, DS420+, DS423+, DS720+ and DS920+ units. It adds capacity to the single slot in these NAS models, letting them handle more simultaneous file operations and container workloads.

JEDEC-standard unbuffered module

The stick follows PC4-21300 timing at CL19 and runs at 1.2 V without a heat spreader. Its 260-pin edge connector fits the SO-DIMM socket directly, and the module is backwards compatible with 2400 MHz and 2133 MHz bus speeds if the system requires a lower frequency.

Low-voltage operation for quiet NAS use

At 1.2 V the module draws minimal power, keeping internal temperatures low in the passively cooled DiskStation chassis. No fan or active cooling is needed on the memory itself, so the upgrade adds performance without increasing system noise.

Highlights

  • Boosts Synology NAS responsiveness with 8 GB DDR4 2666 MHz module
  • JEDEC-standard 1.2 V design ensures warranty-safe upgrade
  • CL19 latency and 2Rx8 organisation deliver stable multitasking
  • Backward compatible with 2400 MHz and 2133 MHz systems
  • Fits DS220+, DS420+, DS423+, DS720+ and DS920+ DiskStations

Specifications

BrandOWC
Part Number2S6D42R808GB
Capacity8GB
Type260-Pin DDR4 Non-ECC SODIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCNo
Buffered/RegisteredUnbuffered
Rank2Rx8
Heat SpreaderNo
Compatible SystemSynology DiskStation DS220+
Synology DiskStation DS420+
Synology DiskStation DS423+
Synology DiskStation DS720+
Synology DiskStation DS920+

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Questions about this item

Does the DDR4 2666 PC4-21300 interface cap at 2666 MT/s in the listed Synology NAS units?

The module runs at 2666 MT/s PC4-21300 CL19 1.2V and is backward compatible with 2400 and 2133 MT/s systems.

Will the 260-pin SODIMM fit the memory slot in a DS420+ without a heat spreader?

Yes, the 260-pin unbuffered SODIMM has no heat spreader and matches the DS420+ slot dimensions.

What is the correct installation step for this non-ECC module in a DS920+ and what do people often miss?

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

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