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

OWC

OWC 4GB DDR4 2666 CL19 260-pin SODIMM for QNAP TS-1253DU-RP

SKU CH-FAKV-0YZJE

4GB DDR4 2666MHz CL19 SODIMM validated for QNAP TS-1253DU-RP NAS upgrades

  • Total capacity4 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Memory rank1Rx8
  • 4GB DDR4 2666 CL19 SODIMM expands QNAP TS-1253DU-RP memory capacity
  • JEDEC-standard PC4-21300 module ensures warranty-safe NAS upgrade
  • Low 1.2V DDR4 voltage reduces system power draw
  • Backward compatible with 2400MHz and 2133MHz DDR4 speeds
  • 260-pin unbuffered non-ECC design fits QNAP TS-1253DU-RP slot

Targeted NAS Memory Upgrade

This OWC module is a 4GB DDR4 2666 SODIMM built specifically for the QNAP TS-1253DU-RP. It replaces the original QNAP part numbers RAM-4GDR4A0-SO-2666, RAM-4GDR4T0-SO-2666 and RAM-4GDR4T1-SO-2666. Buyers needing ECC error correction or higher capacity modules should look elsewhere.

Straightforward Slot Installation

The 260-pin SODIMM inserts directly into the NAS memory slot without tools. Because it is an unbuffered, non-ECC 1Rx8 design at 1.2V, it meets the JEDEC standard for the platform. Installers must ensure the system is fully powered down and disconnected before opening the chassis.

2666 MT/s Speed Rating

The decisive specification is the DDR4 2666 (PC4-21300) CL19 speed grade. The module is backward compatible with 2400 and 2133 MHz bus speeds if the system requires it. This exact speed rating determines whether the NAS will recognise and run the memory at its rated performance.

How it compares

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

Price $24.99
Cheaper than about 88% of the 21,161 comparable items (median $397.99).
Total capacity 4 GB
Lower than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $6.25 per GB
Cheaper than about 63% 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 number2S6D41R804 GB
Total capacity4 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-1253DU-RP

Questions about this item

How do I confirm the 2666 CL19 module is running correctly in my TS-1253DU-RP after installation?

Check the NAS system information page; it should show 4 GB DDR4 at 2666 MHz with CL19 timing and 1.2 V operation.

What comes in the box and do I need any extra parts for the TS-1253DU-RP?

The package contains one 4 GB 260-pin DDR4 SODIMM; no additional components or tools are required for this NAS.

Which capacity should I choose for the TS-1253DU-RP upgrade?

This listing is a single 4 GB module; select it if your TS-1253DU-RP has a free slot and you need a 4 GB increase.

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