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Green rectangular DDR4 SODIMM circuit board with gold edge contacts and black memory chips

OWC

OWC 8GB DDR4 2666 ECC SODIMM for Synology DS1525+ DS1825+ DS1825xs+ DS725+ DS925+

SKU CH-6KBG-8Z3T2

8GB DDR4 2666 ECC SODIMM adds 8GB of error-correcting memory to Synology DS1525+, DS1825+, DS1825xs+, DS725+ and DS925+ NAS units

  • Capacity8GB
  • Type260-Pin DDR4 ECC SODIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes
  • ECC protection guards data integrity in supported Synology NAS
  • 8GB DDR4 2666 module adds capacity for multitasking workloads
  • 2V operation reduces power draw versus higher-voltage memory
  • 260-pin SODIMM fits DS1525+, DS1825+, DS1825xs+, DS725+, DS925+
  • Backward compatible with 2400MHz and 2133MHz systems

NAS memory upgrade

This 8GB DDR4 ECC SODIMM is built for Synology DiskStation models DS1525+, DS1825+, DS1825xs+, DS725+ and DS925+. It adds capacity to NAS appliances that handle file serving, virtualization or container workloads where data integrity matters. The module replaces Synology part numbers D4ES01-8G and D4ES02-8G with a single 260-pin stick. Buyers needing higher-density DIMMs or registered memory for other platforms should look elsewhere.

Sustained workload behaviour

Rated at 2666 MT/s with CL19 timing, the module runs at JEDEC-standard PC4-21300 speeds without overclocking. ECC circuitry corrects single-bit errors on the fly during long backup, scrubbing or database jobs. The 1Rx8 organisation keeps electrical loading low when multiple slots are populated. Systems that require faster data rates or lower latency than the rated specification will not gain from this part.

Thermals, noise and power

Operating at 1.2 V without a heat spreader, the module draws minimal power inside a sealed NAS chassis. Passive cooling from system airflow is sufficient for continuous operation. Zero moving parts means the upgrade adds no audible noise. Builders targeting ultra-low-power envelopes or fanless enclosures will find the thermal profile compatible.

Highlights

  • ECC protection guards data integrity in supported Synology NAS
  • 8GB DDR4 2666 module adds capacity for multitasking workloads
  • 2V operation reduces power draw versus higher-voltage memory
  • 260-pin SODIMM fits DS1525+, DS1825+, DS1825xs+, DS725+, DS925+
  • Backward compatible with 2400MHz and 2133MHz systems

Specifications

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 DiskStation DS1525+
Synology DiskStation DS1825+
Synology DiskStation DS1825xs+
Synology DiskStation DS725+
Synology DiskStation DS925+

Other versions of this model

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Questions about this item

How much power does the 1.2V DDR4 2666 module draw when the NAS runs continuously?

The module operates at 1.2V DDR4 voltage, which keeps power draw low during 24/7 NAS operation.

Which Synology DiskStation models must I already own for this 260-pin SODIMM to work?

Compatible systems are DS1525+, DS1825+, DS1825xs+, DS725+ and DS925+.

Will this CL19 ECC SODIMM run stably alongside existing 2400MHz memory in my DS925+?

Yes, it is backward compatible with 2400MHz and 2133MHz modules, so mixed-speed configurations work.

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