Crucial 16GB DDR4-2666 SODIMM
CT16G4SFD8266
DDR42666MHz16GBSO-DIMM
RAM for QNAP TS-664 (TS-664)
Model Years: 2023–2024
Max RAM: 16GBRAM Slots: 2RAM Type: DDR4 2666MHz
✓ RAM Upgradeable
Quick answer
Our data matches the QNAP TS-664 (TS-664) with Crucial 16GB DDR4-2666 SODIMM (DDR4, SO-DIMM, 2666MHz, 16GB); Crucial 8GB DDR4-2666 SODIMM (DDR4 ECC, SO-DIMM, 2666MHz, 8GB); Crucial 8GB DDR4-2666 SODIMM (DDR4, SO-DIMM, 2666MHz, 8GB).
Supported memory profile: DDR4, SO-DIMM, 2666MHz, up to 16GB max, 2 slots.
Before buying, confirm your exact model number, memory generation, form factor (SO-DIMM), speed, and maximum supported capacity. Live eBay listings are shown below and may change.
Compatible RAM for the QNAP TS-664
Listings and prices are pulled from eBay and may change. Always verify compatibility before purchase. Listings are updated daily.
HIGH
Crucial 8GB DDR4-2666 SODIMM
CT8G4SFS8266
DDR4 ECC2666MHz8GBSO-DIMM
Crucial 8GB DDR4-2666 SODIMM
10 listings
Crucial 8GB DDR4-2666 SODIMM
CT8G4SFRA266
DDR42666MHz8GBSO-DIMM
Crucial 8GB DDR4-2666 SODIMM
7 listings
Frequently Asked Questions
What RAM fits the QNAP TS-664 (TS-664)?
Based on our compatibility data, the QNAP TS-664 (TS-664) supports DDR4, SO-DIMM, 2666MHz, up to 16GB max, 2 slots. Matched modules include Crucial 16GB DDR4-2666 SODIMM (DDR4, SO-DIMM, 2666MHz, 16GB); Crucial 8GB DDR4-2666 SODIMM (DDR4 ECC, SO-DIMM, 2666MHz, 8GB); Crucial 8GB DDR4-2666 SODIMM (DDR4, SO-DIMM, 2666MHz, 8GB). Always confirm your exact model number before purchasing.
How do I verify RAM compatibility?
Check that your device label or manual shows TS-664 (or TS-664). Confirm memory generation, form factor (SO-DIMM), speed, slot count, and maximum supported capacity match the specs on this page before ordering.
Can I mix RAM speeds or capacities?
Many systems run best with matched pairs (same capacity and speed). Mixing capacities or speeds may work but can force lower speeds or single-channel mode — check your OEM documentation.
Are these listings live and current?
Current eBay listings for compatible RAM modules are shown below. Prices and availability change frequently — verify listing details and seller ratings before you buy.
RAM Upgrade Guide for the QNAP TS-664
This device uses DDR4 at 2666MHz. Maximum supported capacity is 16GB.
This model has 2 RAM slots. Installing matched pairs (dual-channel) gives the best performance — use identical capacity modules in both slots.
Always power off and unplug your device before installing RAM. Ground yourself to avoid static discharge.