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Two green DDR3 ECC UDIMM modules side by side

OWC

OWC 8GB (2x4GB) DDR3 1600 ECC UDIMM Kit Synology RC18015xs+ RS10613xs+ RS18016xs+ RS3413xs+ RS3614xs+

SKU CH-W2CC-RSW48

DDR3 ECC unbuffered UDIMM kit adds 8 GB across two 4 GB modules at 1600 MHz CL11 for compatible Synology NAS models

  • Capacity8GB (2 x 4GB)
  • Type240-Pin DDR3 ECC UDIMM
  • SpeedDDR3 1600 (PC3 12800)
  • CAS LatencyCL11
  • Voltage1.5V
  • ECCYes

Capacity 8GB (2 x 4GB)

  • ECC protection prevents data corruption in Synology NAS
  • 8 GB kit adds capacity with two 4 GB modules
  • DDR3 1600 CL11 speed matches system requirements
  • JEDEC and RoHS compliant for warranty-safe upgrades
  • Unbuffered 240-pin UDIMM installs easily in listed models

Synology NAS ECC UDIMM Kit

This OWC kit supplies 8 GB of DDR3 1600 ECC unbuffered memory in a matched pair of 4 GB modules. It is built for the Synology RC18015xs+, RS10613xs+, RS18016xs+, RS3413xs+ and RS3614xs+ NAS platforms. The modules run at 1.5 V with CL11 latency and use a 240-pin 1Rx8 layout.

Upgrade from lower-capacity DDR3 ECC DIMMs

Replacing smaller or non-ECC sticks with this kit adds error-correcting capacity without changing voltage or slot layout. The jump is worthwhile when the NAS runs virtual machines, large file shares or ZFS pools that benefit from ECC protection. Builders staying on DDR3 platforms will not gain newer memory technology here.

Fits 240-pin DDR3 slots in supported Synology units

Each module occupies a standard UDIMM socket and requires no heat spreader clearance. The kit frees no additional slots beyond the two it fills, so remaining bays stay open for future expansion. Buyers needing registered DIMMs or higher-density modules cannot use this unbuffered 4 GB per stick design.

Highlights

  • ECC protection prevents data corruption in Synology NAS
  • 8 GB kit adds capacity with two 4 GB modules
  • DDR3 1600 CL11 speed matches system requirements
  • JEDEC and RoHS compliant for warranty-safe upgrades
  • Unbuffered 240-pin UDIMM installs easily in listed models

Specifications

BrandOWC
Part Number1E6D31R8008P
Capacity8GB (2 x 4GB)
Type240-Pin DDR3 ECC UDIMM
SpeedDDR3 1600 (PC3 12800)
CAS LatencyCL11
Voltage1.5V
ECCYes
Buffered/RegisteredUnbuffered
Rank1Rx8
Heat SpreaderNo
Compatible SystemSynology NAS RC18015xs+
Synology NAS RS10613xs+
Synology NAS RS18016xs+
Synology NAS RS3413xs+
Synology NAS RS3614xs+

Other versions of this model

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Questions about this item

Will the 240-pin DDR3 UDIMM modules fit the memory slots in my Synology RS3413xs+?

Yes, the kit uses 240-pin DDR3 UDIMM form factor which matches the DIMM slots on the RS3413xs+ and the other listed Synology models.

Do I need to install the two 4GB modules as a matched pair in specific slots?

Install both modules in the same channel — usually slots of the same colour — so the NAS can run in dual-channel mode; a single module in one channel will work but halves bandwidth.

How long before the ECC UDIMM chips typically need replacement under 24/7 NAS operation?

DDR3 ECC UDIMMs have no moving parts and are rated for continuous duty; they generally last the usable life of the NAS unless a rare cell failure triggers correctable ECC errors.

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