--- product_id: 725215992 title: "Crucial 4GB (1x4GB) DDR4 2666MT/s (PC4-21300) CL19 SODIMM 260pin CT4G4SFS8266 Laptop Memory Upgrade" brand: "crucial" price: "$154.47" currency: USD in_stock: true category: "Crucial(クルーシャル)" url: https://www.desertcart.us/products/725215992-crucial-4gb-1x4gb-ddr4-2666mt-s-pc4-21300-cl19-sodimm store_origin: US region: United States of America --- # 2666 MT/s blazing speed 4GB capacity for smooth multitasking 260-pin SODIMM compact design Crucial 4GB (1x4GB) DDR4 2666MT/s (PC4-21300) CL19 SODIMM 260pin CT4G4SFS8266 Laptop Memory Upgrade **Brand:** crucial **Price:** $154.47 **Availability:** ✅ In Stock ## Summary > ⚡ Upgrade your laptop’s brainpower — because speed is the new smart! ## Quick Answers - **What is this?** Crucial 4GB (1x4GB) DDR4 2666MT/s (PC4-21300) CL19 SODIMM 260pin CT4G4SFS8266 Laptop Memory Upgrade by crucial - **How much does it cost?** $154.47 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/725215992-crucial-4gb-1x4gb-ddr4-2666mt-s-pc4-21300-cl19-sodimm) ## Best For - crucial enthusiasts ## Why This Product - Trusted crucial brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Plug & Play Upgrade:** Easy installation to instantly elevate your laptop’s performance and future-proof your workflow. - • **Reliable 4GB Capacity:** Boost your multitasking power with a solid 4GB memory upgrade. - • **Compact 260-Pin SODIMM:** Designed for sleek laptops, maximizing performance without bulk. - • **Blazing DDR4-2666 Speed:** Experience lightning-fast data transfer at 2666 MT/s for seamless productivity. - • **Trusted Crucial Quality:** Backed by Micron’s industry-leading reliability and a strong 4.7-star rating. ## Overview The Crucial 4GB DDR4 2666MT/s SODIMM is a high-performance laptop memory module featuring a compact 260-pin design, optimized for fast data transfer and reliable multitasking. Trusted by professionals and backed by Micron’s quality, it offers an easy upgrade path to enhance your laptop’s speed and efficiency. ## Description Crucial (Micron) PC4-21300 (DDR4-2666) 1 x 4GB 260pin CT4G4SFS8266 Laptop Memory ## Features - Laptop Memory - Standard: PC4-21300 (DDR4-2666) - Capacity: 4GB - Type: 260Pin DDR4-SDRAM Unbuffered SODIMM ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07HP78DZ5 | | Amazon Bestseller | #62,834 in Computers ( See Top 100 in Computers ) #347 in Computer Memory | | Brand | Crucial | | Column Address Strobe Latency | 19 | | Compatible Devices | PC/servidor | | Customer Reviews | 4.7 4.7 out of 5 stars (4,168) | | Data Transfer Rate | 42664 Megabits Per Second | | Form Factor | SO-DIMM | | Global Trade Identification Number | 00649528787286 | | Item Weight | 8 Grams | | Manufacturer | Crucial(クルーシャル) | | Memory Form Factor | SODIMM | | Memory Generation | DDR4 | | Memory Speed | 2666 MHz | | Mfr Part Number | CT4G4SFS8266 | | Model Number | CT4G4SFS8266 | | Number of Pins | 260 | | RAM Memory Technology | DDR4 | | RAM Size | 4 GB | | UPC | 649528787286 064952878728 | | Voltage | 12 Volts | | Warranty Description | Complies with manufacturer's warranty | ## Product Details - **Brand:** Crucial - **Compatible Devices:** PC/servidor - **Computer Memory Size:** 4 GB - **Memory Speed:** 2666 MHz - **RAM Memory Technology:** DDR4 ## Images ![Crucial 4GB (1x4GB) DDR4 2666MT/s (PC4-21300) CL19 SODIMM 260pin CT4G4SFS8266 Laptop Memory Upgrade - Image 1](https://m.media-amazon.com/images/I/61FsaYbk3UL.jpg) ![Crucial 4GB (1x4GB) DDR4 2666MT/s (PC4-21300) CL19 SODIMM 260pin CT4G4SFS8266 Laptop Memory Upgrade - Image 2](https://m.media-amazon.com/images/I/710w79j715L.jpg) ![Crucial 4GB (1x4GB) DDR4 2666MT/s (PC4-21300) CL19 SODIMM 260pin CT4G4SFS8266 Laptop Memory Upgrade - Image 3](https://m.media-amazon.com/images/I/61-737PUDOL.jpg) ![Crucial 4GB (1x4GB) DDR4 2666MT/s (PC4-21300) CL19 SODIMM 260pin CT4G4SFS8266 Laptop Memory Upgrade - Image 4](https://m.media-amazon.com/images/I/61phcwp7f7L.jpg) ![Crucial 4GB (1x4GB) DDR4 2666MT/s (PC4-21300) CL19 SODIMM 260pin CT4G4SFS8266 Laptop Memory Upgrade - Image 5](https://m.media-amazon.com/images/I/71agpnji7IL.jpg) ## Available Options This product comes in different **Pattern** options. ## 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 ## 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) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/725215992-crucial-4gb-1x4gb-ddr4-2666mt-s-pc4-21300-cl19-sodimm](https://www.desertcart.us/products/725215992-crucial-4gb-1x4gb-ddr4-2666mt-s-pc4-21300-cl19-sodimm) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-16*