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Four green circuit boards with black chips, no heat spreaders, 260-pin DDR4 SODIMM modules

OWC

OWC 64GB (4x16GB) DDR4 2666MHz ECC SODIMM memory upgrade

SKU CH-0WTV-MG5GW

A 64GB DDR4 2666MHz ECC SODIMM kit of four 16GB modules for Synology systems

  • Capacity64GB (4 x 16GB)
  • Type260-Pin DDR4 ECC SODIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.20V
  • ECCYes

Capacity 64GB (4 x 16GB)

  • 64GB total capacity from four 16GB modules
  • DDR4 2666MHz speed with CL19 latency
  • ECC protection detects and corrects data errors
  • 2V operation reduces power consumption
  • Backward compatible with 2400MHz and 2133MHz systems

64GB DDR4 ECC SODIMM kit

This kit delivers 64GB of DDR4 2666MHz ECC unbuffered memory in four 16GB modules. It uses the 260-pin SODIMM form factor and runs at 1.2V with CL19 latency. The memory is designed for Synology NAS systems and other micro servers that require error-correcting code support.

Suited for Synology NAS upgrades

Ideal for administrators expanding Synology D4ECSO-2666-16G or D4ES01-16G compatible units to 64GB. The modules are backwards compatible with 2400MHz and 2133MHz systems. Not for desktop PCs that need standard non-ECC SODIMMs, nor for platforms requiring registered or load-reduced DIMMs.

Straightforward SODIMM installation

Insert each module into the NAS memory slots until the side clips lock; no tools are required. The low-profile design fits tight chassis without a heat spreader. Common issues include mixing ECC with non-ECC modules or not seating all four sticks fully, which prevents the system from recognising the full 64GB capacity.

Points forts

  • 64GB total capacity from four 16GB modules
  • DDR4 2666MHz speed with CL19 latency
  • ECC protection detects and corrects data errors
  • 2V operation reduces power consumption
  • Backward compatible with 2400MHz and 2133MHz systems

Caractéristiques

BrandOWC
Part Number2C6D42R8064S
Capacity64GB (4 x 16GB)
Type260-Pin DDR4 ECC SODIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.20V
ECCYes
Buffered/RegisteredUnbuffered
Rank2Rx8
Heat SpreaderNo
Compatible SystemSynology

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Questions sur cet article

Does my Synology NAS need four free 260-pin SODIMM slots to use this 64 GB kit?

Yes, the kit contains four 16 GB modules and each one occupies a single 260-pin DDR4 SODIMM slot.

Will these 2666 MHz ECC modules down-clock if my NAS currently runs 2400 MHz memory?

They are backward compatible with 2400 MHz and 2133 MHz systems, so they will operate at the lower speed automatically.

How can I confirm the NAS recognises all 64 GB of ECC memory after installation?

Check the system information page in DSM; it should report 64 GB total capacity and show ECC status as active.

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