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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

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Memory rank2Rx8
  • 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.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $118.99
Cheaper than about 65% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $7.44 per GB
Cheaper than about 55% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameOWC
Part number2E6D42R816 GB
Total capacity16 GB
Product type288-Pin DDR4 ECC UDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportYes
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsQNAP TS-h1283XU-RP
QNAP TS-h1683XU-RP
QNAP TS-h2483XU-RP
QNAP TS-h686
QNAP TS-h886

Other versions of this model

5 more in the same range

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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