Crucial CT2K4G4SFS8266

Overview

The Crucial CT2K4G4SFS8266 is a memory module kit designed to boost your laptop’s performance by providing 8GB of DDR4 RAM through two 4GB SO-DIMM modules. Running at 2666 MHz, it accelerates everyday tasks such as web browsing, document editing, and multitasking, making your system more responsive and efficient. Operating at a low voltage of 1.2V, this memory kit helps extend battery life while maintaining solid performance.

Its non-ECC and unbuffered design ensures compatibility with most laptops and small form factor PCs that support SO-DIMM slots, making it an easy upgrade for users seeking improved multitasking or a performance refresh. With a CAS latency of 19, it delivers stable and reliable operation suitable for daily computing needs.

Key features

• Provides 8GB total memory capacity through two 4GB modules, enhancing multitasking capabilities
• DDR4 technology running at 2666 MHz for faster data processing and smoother system responsiveness
• Low 1.2V operating voltage reduces power consumption, helping to extend laptop battery life
• Non-ECC and unbuffered design ensures broad compatibility with most SO-DIMM equipped laptops and PCs
• Single rank x8-based chips deliver consistent reliability and performance stability
• CAS latency of 19 balances speed and stability for everyday computing tasks
• Backed by Micron’s trusted quality and a limited lifetime warranty for long-term peace of mind

Key specs

• Memory type: DDR4 SO-DIMM
• Capacity: 8GB (2 x 4GB modules)
• Speed: 2666 MHz
• Voltage: 1.2V
• CAS latency: 19
• Module rank: Single rank x8
• Form factor: SO-DIMM

Compatibility and usage

This memory kit fits laptops and small form factor PCs that support DDR4 SO-DIMM slots, making it a practical choice for users looking to upgrade older systems or improve performance in everyday computing environments. It works well for office tasks, web browsing, and running multiple applications simultaneously without lag.

Its low power consumption and reliable design make it suitable for mobile users who need longer battery life without compromising on speed. Whether you are refreshing an aging laptop or building a compact PC, this kit offers a balanced combination of performance and efficiency.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, and include all tags, manuals, accessories, and original, unaltered packaging. To start a return, please email us for approval. Items sent back without approval may be refused or returned to the sender. If any item is kept, its value will be deducted from the refund.

Non-returnable items include opened TVs, combos, or monitors 37″ or larger, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method. Please allow 5–7 business days for the credit to post. Shipping and handling are nonrefundable. If an item is used, incomplete, or not in its original condition, a 30% restocking fee may apply. Direct exchanges are not offered. To exchange an item, please purchase the replacement separately and return the original for a refund.

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We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

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