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Green circuit board with black memory chips and gold edge connector

OWC

OWC 8GB DDR4 2666 CL19 1Rx8 260-pin 1.2V Non-ECC SODIMM memory upgrade

SKU CH-4C9A-0NNB9

Adds 8 GB of DDR4 2666 CL19 SODIMM memory to compatible QNAP NAS models

  • Total capacity8 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Memory rank1Rx8
  • 8 GB capacity expands NAS multitasking headroom
  • DDR4 2666 speed matches QNAP TS-435XeU TS-473A TS-673A TS-873A TVS-472XT specs
  • CL19 latency and 1.2 V voltage keep power draw low
  • JEDEC and RoHS compliance ensures warranty-safe upgrade
  • 260-pin SODIMM form factor fits laptop mini-desktop micro-server NAS slots

Targeted NAS Upgrade

This OWC module adds 8 GB of DDR4 2666 memory to compatible QNAP NAS units including the TS-435XeU, TS-473A, TS-673A, TS-873A and TVS-472XT. It is built for administrators who need a straightforward capacity increase without changing voltage or form factor. The non-ECC, unbuffered design matches the original specification for these systems.

Capacity and Speed Limits

The single 8 GB rank runs at PC4-21300 with CL19 latency and 1.2 V, delivering the standard throughput these platforms expect. It will down-clock to 2400 MHz or 2133 MHz if the slot requires it, but it cannot exceed the DDR4 2666 ceiling. Builders who need more than 8 GB per slot or require ECC protection must look elsewhere.

Build Integration

The 260-pin SODIMM fits directly into the memory slot on the listed QNAP models with no adapter or heat spreader needed. JEDEC and RoHS compliance keep the upgrade warranty-safe, and the low-profile design leaves clearance for tight chassis layouts. No BIOS changes or additional power connections are required for installation.

How it compares

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

Price $43.99
Cheaper than about 79% of the 21,161 comparable items (median $397.99).
Total capacity 8 GB
Lower than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $5.50 per GB
Cheaper than about 70% 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 number2S6D41R808 GB
Total capacity8 GB
Product type260-Pin DDR4 Non-ECC SODIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportNo
Buffer typeUnbuffered
Memory rank1Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsQNAP TS-435XeU
QNAP TS-473A
QNAP TS-673A
QNAP TS-873A
QNAP TVS-472XT

Other versions of this model

5 more in the same range

Questions about this item

Will the 2666MHz CL19 module run correctly alongside my existing 2400MHz DDR4 SODIMMs in a QNAP TS-473A?

Yes, the module is backwards compatible with 2400MHz and 2133MHz systems, so it will operate at the speed of the slowest installed module.

How can I confirm the 8GB 1Rx8 module is recognised at 2666MHz after installing it in my TS-873A?

Check the system information or resource monitor in the QNAP OS; it will display the installed capacity, speed and rank configuration for each slot.

Does the single 260-pin SODIMM arrive with a heat spreader or any tools, or must I buy those separately?

The module has no heat spreader and no tools are included; only the memory stick itself is supplied in the package.

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