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Green 260-pin DDR4 SODIMM module with black chips, no heat spreader

OWC

OWC 4GB DDR4 2666 CL19 260-pin SODIMM memory upgrade for Synology DS1520+

SKU CH-E18G-CW652

Adds 4 GB of DDR4-2666 non-ECC SODIMM memory to a Synology DS1520+ NAS

  • Capacity4GB
  • Type260-Pin DDR4 Non-ECC SODIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCNo
  • Designed for Synology DS1520+ NAS upgrade
  • DDR4 2666 CL19 speed boosts responsiveness
  • JEDEC-standard 1.2V module ensures warranty-safe install
  • Single-rank 1Rx8 260-pin SODIMM fits DS1520+ slot
  • Backward compatible with 2400 and 2133 MHz systems

Single-module 4 GB DDR4 upgrade for DS1520+

This SODIMM adds 4 GB of DDR4 memory to a Synology DiskStation DS1520+. It is a 260-pin unbuffered non-ECC module rated at 2666 MT/s with CL19 latency and 1.2 V operation. The single-rank 1Rx8 design matches the OEM specification for straightforward capacity expansion.

Thermals noise and power in normal use

The module runs at the standard 1.2 V without a heat spreader, so power draw stays low during typical NAS workloads such as file serving or light virtualization. Passive cooling inside the DiskStation chassis is sufficient for everyday operation. No moving parts mean the upgrade adds no audible noise.

Behaviour under sustained load

Under continuous heavy use the memory maintains its JEDEC-rated 2666 MT/s speed and CL19 timing without throttling. The 1Rx8 organisation keeps signal integrity stable during prolonged multi-tasking or RAID rebuilds. Backward compatibility with 2400 and 2133 MT/s systems allows the module to down-clock automatically if the platform requires it.

Highlights

  • Designed for Synology DS1520+ NAS upgrade
  • DDR4 2666 CL19 speed boosts responsiveness
  • JEDEC-standard 1.2V module ensures warranty-safe install
  • Single-rank 1Rx8 260-pin SODIMM fits DS1520+ slot
  • Backward compatible with 2400 and 2133 MHz systems

Specifications

BrandOWC
Part Number2S6D41R804GB
Capacity4GB
Type260-Pin DDR4 Non-ECC SODIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCNo
Buffered/RegisteredUnbuffered
Rank1Rx8
Heat SpreaderNo
Compatible SystemSynology DiskStation DS1520+

Other versions of this model

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Questions about this item

How do I install the 260-pin SODIMM in my DS1520+, and what step do people often miss?

Power off the NAS, remove the drive trays, open the chassis cover, insert the module at an angle into the slot until the clips click, then reassemble. People often forget to fully seat the module so both retaining clips engage.

What maintenance or replacement will this 4GB DDR4 2666 CL19 module need later?

No scheduled maintenance is required. The module has no heat spreader and runs at 1.2V; replacement is only needed if a memory error appears or you decide to increase capacity beyond the current 4GB.

What limit appears first under sustained use with this CL19 2666MHz SODIMM?

The CAS latency of 19 cycles at 2666MHz sets the access timing ceiling; sustained workloads will hit this latency bound before the 1.2V power envelope or the single-rank 1Rx8 organisation becomes a bottleneck.

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