---
product_id: 725215992
title: "Crucial 4GB DDR4 2666MT/s(PC4-21300) CL19 SODIMM 260pin CT4G4SFS8266 Laptop Memory Upgrade"
brand: "crucial(クルーシャル)"
price: "€ 3714.89"
currency: EUR
in_stock: false
reviews_count: 13
url: https://www.desertcart.com.cy/products/725215992-crucial-4gb-ddr4-2666mt-s-pc4-21300-cl19-sodimm-260pin
store_origin: CY
region: Cyprus
---

# DDR4-2666 MT/s speed 4GB capacity 260-pin SO-DIMM form factor Crucial 4GB DDR4 2666MT/s(PC4-21300) CL19 SODIMM 260pin CT4G4SFS8266 Laptop Memory Upgrade

**Brand:** crucial(クルーシャル)
**Price:** € 3714.89
**Availability:** ❌ Out of Stock

## Summary

> 🚀 Elevate your laptop’s speed and never miss a beat!

## Quick Answers

- **What is this?** Crucial 4GB DDR4 2666MT/s(PC4-21300) CL19 SODIMM 260pin CT4G4SFS8266 Laptop Memory Upgrade by crucial(クルーシャル)
- **How much does it cost?** € 3714.89 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/725215992-crucial-4gb-ddr4-2666mt-s-pc4-21300-cl19-sodimm-260pin)

## Best For

- crucial(クルーシャル) enthusiasts

## Why This Product

- Trusted crucial(クルーシャル) brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Powerhouse:** 4GB memory module designed to fit perfectly in your slim notebook without bulk.
- • **Plug & Play Simplicity:** 260-pin SO-DIMM ensures seamless installation and instant performance gains.
- • **Reliable Micron Quality:** Crafted by Crucial (Micron), a trusted name for durable and stable memory.
- • **Boost Your Laptop's Agility:** Upgrade to DDR4-2666 for lightning-fast multitasking and smoother workflows.
- • **Future-Proof Your Productivity:** Perfect for professionals who demand speed and efficiency on the go.

## Overview

The Crucial 4GB DDR4-2666 SO-DIMM memory module (PC4-21300) is a compact, high-speed RAM upgrade designed for laptops. With a 260-pin form factor and Micron manufacturing quality, it delivers reliable performance boosts for everyday multitasking and professional workloads.

## Description

Crucial (Micron) Laptop Memory PC4-21300 (DDR4-2666) 1 4GB 260pin CT4G4SFS8266

Review: Synology nas DS224+のメモリ増設のために購入しました。 メーカー推奨は高額で、推奨ではないですが、特に問題なく使えています。
Review: Synology DS220+のメモリ増設にて純正品が高かったので他にないか探していたところ Crucial製のメモリを使っている記事があり試しに購入してみました。 特に問題なくSynology DS220+で使用できました。 導入後 まだ時間がたっていませんがエラーもなく警告もなく使用できています。

## Features

- Laptop Memory
- Standard: PC4-21300 (DDR4-2666)
- Capacity: 4GB
- Type: 260Pin DDR4-SDRAM Unbuffered SODIMM

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Crucial(クルーシャル) |
| Manufacturer | Crucial(クルーシャル) |
| Product Dimensions | 14 x 1.2 x 3.2 cm; 8 g |
| Batteries | Lithium Ion batteries required. |
| Item model number | CT4G4SFS8266 |
| Is Discontinued By Manufacturer | No |
| Form Factor | SO-DIMM |
| Item dimensions W x H | 14 x 1.2 x 3.2 cm |
| Standing screen display size | 16 Inches |
| Processor Count | 1 |
| RAM Size | 4 GB |
| Memory Technology | DDR4 |
| Computer Memory Type | DDR4 SDRAM |
| Memory Clock Speed | 2666 MHz |
| Voltage | 12 Volts |
| Wattage | 1000 |
| Are Batteries Included | No |
| Lithium Battery Energy Content | 2 Kilowatt Hours |
| Lithium Battery Packaging | Batteries packed with equipment |
| Lithium Battery Weight | 2 Grams |
| Number Of Lithium Ion Cells | 5 |
| Nombre de cellules Lithium-Métal | 5 |
| Item Weight | 8 g |

## Product Details

- **Brand:** Crucial(クルーシャル)
- **Computer Memory Size:** 4 GB
- **RAM Memory Technology:** DDR4
- **Memory Speed:** 2666 MHz
- **Compatible Devices:** PC/servidor

## Images

![Crucial 4GB DDR4 2666MT/s(PC4-21300) CL19 SODIMM 260pin CT4G4SFS8266 Laptop Memory Upgrade - Image 1](https://m.media-amazon.com/images/I/61-737PUDOL._AC_SX679_.jpg)
![Crucial 4GB DDR4 2666MT/s(PC4-21300) CL19 SODIMM 260pin CT4G4SFS8266 Laptop Memory Upgrade - Image 2](https://m.media-amazon.com/images/I/61FsaYbk3UL._AC_SL1080_.jpg)
![Crucial 4GB DDR4 2666MT/s(PC4-21300) CL19 SODIMM 260pin CT4G4SFS8266 Laptop Memory Upgrade - Image 3](https://m.media-amazon.com/images/I/61FsaYbk3UL._AC_SX679_.jpg)
![Crucial 4GB DDR4 2666MT/s(PC4-21300) CL19 SODIMM 260pin CT4G4SFS8266 Laptop Memory Upgrade - Image 4](https://m.media-amazon.com/images/I/61phcwp7f7L._AC_SX679_.jpg)
![Crucial 4GB DDR4 2666MT/s(PC4-21300) CL19 SODIMM 260pin CT4G4SFS8266 Laptop Memory Upgrade - Image 5](https://m.media-amazon.com/images/I/710w79j715L._AC_SX679_.jpg)

## Questions & Answers

**Q: T4g4sfs8266 compatible with synology ds220+?**
A: Thank you for your inquiry. 
 
We see that we do not have guaranteed compatible memory available for Synology DS220+. There are a lot of considerations when choosing the correct memory for your system, including memory type, speeds, densities, and more. We request you to refer owners manual of your system and ensure motherboard specifications are matching with CT4G4SFS8266 memory.

Regards.

**Q: is this compatable with asus q524u**
A: we would like to inform you that the RAM CT4G4SFS8266 is compatible with q524uq, q524uqk.

**Q: Es un set de 2x4gb de memoria ram?el titulo lo hace difuso**
A: Hola Sergio,

Gracias por su pregunta, Sí, es el kit de 8G con 2X4Gb de RAM. hay dos modules de 4GB.

**Q: Is this compatible  with a toshiba satellite L455D-S5976?**
A: Thank you for choosing Crucial . We find  CT4G4SFS8266 is not compatible with Toshiba Satellite L455D-S5976

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by M***1 on August 11, 2025*

Synology nas DS224+のメモリ増設のために購入しました。 メーカー推奨は高額で、推奨ではないですが、特に問題なく使えています。

### ⭐⭐⭐⭐⭐ Review
*by S***K on November 16, 2021*

Synology DS220+のメモリ増設にて純正品が高かったので他にないか探していたところ Crucial製のメモリを使っている記事があり試しに購入してみました。 特に問題なくSynology DS220+で使用できました。 導入後 まだ時間がたっていませんがエラーもなく警告もなく使用できています。

### ⭐⭐⭐⭐⭐ Review
*by か***み on March 28, 2022*

会社でＤＳ２２０＋を購入して、レビューサイトでこのメモリも使えるという書き込みを見かけて購入しました。 今のところ問題なく動作しています。 耐久性についてはまだⅠ週間程度なので評価していません。

## Frequently Bought Together

- Crucial 4GB DDR4 SDRAM Memory Module - 4 GB - DDR4 SDRAM - 2666 MHz DDR4-2666/PC4-21300 - 1.20 V - Non-ECC - Unbuffered - 260-Pin - SODIMM, 4GB Single Rank
- Synology 2-Bay DiskStation DS224+ (Diskless)
- Seagate IronWolf 8TB NAS Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 7200 RPM 256MB Cache for RAID Network Attached Storage – Frustration Free Packaging (ST8000VNZ04/N004)

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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-03-02*