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Two green DDR4 ECC UDIMM modules, 288-pin, no heat spreader

OWC

OWC 16GB (2x8GB) DDR4 2666 ECC UDIMM for Synology RackStation RS3618xs memory upgrade

SKU CH-JS1Y-CR11X

16 GB DDR4 2666 ECC UDIMM kit adds error-correcting memory to Synology RS3618xs

  • Capacity16GB (2 x 8GB)
  • Type288-Pin DDR4 ECC UDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes

Capacity 16GB (2 x 8GB)

  • 16 GB dual-channel kit boosts NAS multitasking
  • ECC protection guards data integrity on RS3618xs
  • DDR4 2666 CL19 matches factory speed specs
  • 2 V JEDEC voltage keeps power draw low
  • 288-pin UDIMM fits straight into Synology slots

OWC 16GB DDR4 ECC kit for RS3618xs

This 16GB kit contains two 8GB DDR4 2666 ECC UDIMM modules built for the Synology RackStation RS3618xs. The unbuffered design and error-correcting code suit NAS workloads that demand data integrity. It targets administrators who need a validated capacity increase without changing voltage or form factor.

JEDEC PC4-21300 288-pin UDIMM build

Each module follows the JEDEC PC4-21300 standard at 1.2V with CL19 latency and a single-rank 1Rx8 organisation. The 288-pin UDIMM layout drops straight into the RS3618xs memory slots and requires no heat spreader. Backward compatibility with 2133MHz and 2400MHz systems allows the same kit to serve older platforms if they are later repurposed.

Lifetime warranty and DIY installation support

OWC backs the kit with a limited lifetime warranty and an advanced replacement programme that includes free technical support. A published installation video walks through the upgrade steps, making the process accessible for in-house IT staff. The warranty-safe design protects the original Synology coverage while the memory is installed.

Pluspunten

  • 16 GB dual-channel kit boosts NAS multitasking
  • ECC protection guards data integrity on RS3618xs
  • DDR4 2666 CL19 matches factory speed specs
  • 2 V JEDEC voltage keeps power draw low
  • 288-pin UDIMM fits straight into Synology slots

Specificaties

BrandOWC
Part Number2E6D41R8016P
Capacity16GB (2 x 8GB)
Type288-Pin DDR4 ECC UDIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredUnbuffered
Rank1Rx8
Heat SpreaderNo
Compatible SystemSynology RackstationRS3618xs

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What DDR4 speed and PC4 rating does this 16GB kit run at, and what lower speeds will it fall back to?

The kit is rated for DDR4 2666 PC4-21300 CL19 and will also operate at 2133 and 2400 MHz if the system requires it.

Does the RS3618xs need 288-pin ECC UDIMMs and what voltage do they require?

Yes, the RS3618xs takes 288-pin DDR4 ECC unbuffered DIMMs at 1.2V, which matches this 2x8GB kit exactly.

How do I install the modules in the RS3618xs, and what step do people often miss?

Power off the NAS, open the chassis, insert each 8GB stick firmly until the side clips click, then close the case before powering on — skipping the full power-down is the common mistake.

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