Crucial 4GB DDR4 2666 MHz SO-DIMM Memory Module

The Crucial CT4G4SFS8266 is a 4GB DDR4 SO-DIMM that gives a laptop or small form factor PC the extra breathing room it needs for modern workloads. By raising available memory to 4GB at a data rate of 2666 MHz, it cuts the time you spend waiting for web pages, office documents, and everyday applications to load, so multitasking feels fluid instead of frustrating.

This module runs at only 1.2 volts, a design choice that helps keep battery drain in check when you are on the move or working away from an outlet. A CAS latency of 19 keeps response times tight, which is especially noticeable when you have multiple browser tabs, spreadsheets, and video calls open at once.

Anyone with a small screwdriver can handle the installation. Locate the 260-pin DDR4 SO-DIMM slot, press the module into place at a slight angle, and lock it down; the whole process takes just a few minutes even if you have never opened a laptop before. No additional software, settings, or cables are required.

The module is single rank, unbuffered, and non-ECC, making it a straightforward drop-in upgrade for consumer notebooks, all-in-one desktops, and compact media centers that accept DDR4 memory. Students who need responsive machines for research, remote workers juggling conference calls and cloud apps, and travelers editing photos on the go will all notice the improvement.

Crucial is part of Micron, one of the largest memory manufacturers in the world, and this module is backed by a limited lifetime warranty. In practical terms, that means reliable performance backed by decades of engineering expertise and support if something goes wrong.

Highlights:

• 4GB DDR4 memory module designed for laptops and small form factor PCs
• 2666 MHz data rate helps applications open and switch faster
• CAS latency 19 provides snappy response during multitasking
• Single rank design that is unbuffered and non-ECC
• Runs at 1.2V to conserve battery life and reduce heat
• Installs in minutes in any system with a standard 260-pin SO-DIMM slot
• Built on Micron’s 40-plus years of memory expertise
• Protected by a limited lifetime warranty for added peace of mind