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Green circuit board with black memory chips and gold contacts

OWC

OWC 16GB DDR4 2666 CL19 ECC UDIMM 2Rx8 1.2V 288-pin memory upgrade

SKU CH-PA1H-MVKB5

16 GB DDR4-2666 ECC UDIMM CL19 1.2 V for QNAP TS-h1283XU-RP, TS-h1683XU-RP, TS-h2483XU-RP, TS-h686, TS-h886

  • Capacity16GB
  • Type288-Pin DDR4 ECC UDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes
  • 16 GB single module expands NAS memory
  • ECC protection guards data integrity in critical workloads
  • DDR4 2666 CL19 speed matches OEM specifications
  • 2 V low voltage reduces power draw
  • Validated for QNAP TS-h1283XU-RP TS-h1683XU-RP TS-h2483XU-RP TS-h686 TS-h886

16GB DDR4 2666 ECC UDIMM

This 16GB DDR4 2666 ECC UDIMM is a single unbuffered module built to JEDEC and RoHS standards. It runs at PC4-21300 with CL19 timing and 1.2V, and it replaces QNAP part numbers RAM-16GDR4ECT0-UD-2666 and RAM-16GDR4ECP0-UD-2666. The 2Rx8 rank configuration fits the listed NAS platforms.

Who it suits and who it does not

It suits owners of the QNAP TS-h1283XU-RP TS-h1683XU-RP TS-h2483XU-RP TS-h686 and TS-h886 who need ECC memory. Builders who need non-ECC modules or a different capacity should look elsewhere. Systems that require registered DIMMs will not accept this unbuffered design.

Deciding specification: ECC unbuffered DDR4

The module is an unbuffered ECC DDR4 DIMM. That single attribute determines whether the system will post and run correctly. Verify the NAS documentation calls for unbuffered ECC before ordering.

Highlights

  • 16 GB single module expands NAS memory
  • ECC protection guards data integrity in critical workloads
  • DDR4 2666 CL19 speed matches OEM specifications
  • 2 V low voltage reduces power draw
  • Validated for QNAP TS-h1283XU-RP TS-h1683XU-RP TS-h2483XU-RP TS-h686 TS-h886

Specifications

BrandOWC
Part Number2E6D42R816GB
Capacity16GB
Type288-Pin DDR4 ECC UDIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredUnbuffered
Rank2Rx8
Heat SpreaderNo
Compatible SystemQNAP TS-h1283XU-RP
QNAP TS-h1683XU-RP
QNAP TS-h2483XU-RP
QNAP TS-h686
QNAP TS-h886

Other versions of this model

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Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Will this 288-pin DDR4 ECC UDIMM fit my QNAP TS-h1683XU-RP NAS?

Yes, this 16GB module is validated for the TS-h1683XU-RP as well as the TS-h1283XU-RP, TS-h2483XU-RP, TS-h686 and TS-h886.

Can I keep my existing 2133MHz DDR4 ECC sticks and add this 2666MHz module?

The module is backward compatible with 2133MHz and 2400MHz systems, so it will run at the speed of the slowest installed DIMM.

How do I confirm the 16GB ECC module is detected at 2666MHz CL19 after installation?

Check the NAS firmware memory information page; it should report 16GB, DDR4-2666, ECC unbuffered operation with CL19 timings.

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