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Green rectangular circuit board with gold edge connector and black memory chips

OWC

OWC 2S6D42R816GB 16GB DDR4 2666 CL19 2Rx8 260-pin 1.2V Non-ECC SODIMM memory upgrade

SKU CH-5NQV-HVVD2

16 GB DDR4 2666 CL19 SODIMM upgrade for QNAP TS-435XeU, TS-473A, TS-673A, TS-873A and TVS-472XT NAS systems

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Memory rank2Rx8
  • 16GB DDR4 2666 CL19 module boosts multitasking capacity on compatible QNAP NAS
  • JEDEC-standard 1.2V non-ECC SODIMM ensures warranty-safe upgrade without system errors
  • 2Rx8 260-pin design fits TS-435XeU, TS-473A, TS-673A, TS-873A and TVS-472XT
  • Backward compatible with 2400MHz and 2133MHz slots for flexible deployment
  • Single 16GB stick simplifies DIY installation in laptops, mini desktops and micro servers

QNAP NAS memory upgrade

This 16GB DDR4 SODIMM is built for QNAP TS-435XeU, TS-473A, TS-673A, TS-873A and TVS-472XT systems. It replaces OEM part numbers RAM-16GDR4T0-SO-2666, RAM-16GDR4K0-SO-2666 and RAM-16GDR4K1-SO-2666. The module suits administrators expanding capacity in compatible NAS appliances.

Low-voltage operation

Running at 1.2V without a heat spreader, the unbuffered Non-ECC stick draws minimal power and produces negligible noise in a passively cooled chassis. JEDEC-standard timings at CL19 keep thermal output predictable during sustained workloads.

Straightforward installation

The 260-pin form factor slots directly into the supported QNAP models without adapters. Backward compatibility with 2400MHz and 2133MHz systems allows mixed-speed populations. ROHS compliance and OWC testing ensure a warranty-safe upgrade path.

How it compares

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

Price $80.99
Cheaper than about 70% 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 $5.06 per GB
Cheaper than about 76% 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 number2S6D42R816 GB
Total capacity16 GB
Product type260-Pin DDR4 Non-ECC SODIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
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

How do I install the 260-pin DDR4 SODIMM into my QNAP TS-473A and what step is often missed?

Power off the NAS, unplug it, open the chassis, align the notch on the module with the slot key, press firmly until the side clips click, then replace the cover before restoring power; the step often missed is fully seating the module so both clips engage.

What maintenance or replacement will the 16GB CL19 1.2V module need over time?

No routine maintenance is required; the module has no heat spreader or moving parts, so replacement is only necessary if a memory error appears or you upgrade to a higher capacity.

What limit appears first when the 2Rx8 PC4-21300 memory runs sustained workloads on a TS-873A?

The CAS latency of CL19 at 2666 MT/s sets the timing ceiling; under continuous load the latency bound is reached before bandwidth or voltage limits become a factor.

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