This article covers Crucial ノートPC用増設メモリ 4GB(4GBx1枚) DDR4 2400MT.

Overview

The Crucial CT4G4SFS824A is a 4GB DDR4-2400 SODIMM memory module designed for laptop upgrades. Manufactured by Micron's consumer brand Crucial, this module operates at 2400 MT/s (PC4-19200) with CL17 latency at 1.2V. It comes in a 260-pin SO-DIMM form factor, single-ranked, non-ECC, and unbuffered.
This memory is ideal for users looking to breathe new life into an older laptop that struggles with multitasking or basic applications. Adding a single 4GB stick can make a noticeable difference in day-to-day performance such as faster browser tab loading and smoother app switching.

Compatibility Guide

This module is compatible with any laptop that supports DDR4 SODIMM memory. Typical candidates include Intel Skylake (6th-gen) or newer, and AMD Ryzen-based notebooks (with some early exceptions). Always check your laptop's maximum supported memory capacity and the specific memory speed support in the BIOS. Mixing modules of different speeds or timings may cause the system to run at the lower common denominator.

Product Info

The Crucial CT4G4SFS824A has been available since late 2015. At time of writing, it retails for approximately ¥8,310 (≈$58 USD) on online retailers. Crucial offers a limited lifetime warranty on this memory (terms vary by region and retailer). Market positioning is squarely entry-level to mid-range; while DDR5 and faster DDR4-3200 have become common, this module remains a cost-effective upgrade for legacy systems.

Best Use Cases

  • Light office work and web browsing – Adding 4GB to an existing 4GB system (total 8GB) gives Windows 11 enough headroom for multiple tabs and basic productivity apps without stuttering.
  • Budget laptop revitalization – If you're not ready to buy a new computer but feel the slowdown from insufficient RAM, this sub-$60 upgrade is a practical first step.
  • Media consumption and light photo editing – Extra RAM helps when switching between a browser, photo viewer, and a video player, though it will not suffice for heavy video rendering or modern games.
    Who should skip: gamers needing 16GB+, users of modern DDR5 laptops, or those wanting dual-channel kits for maximum bandwidth.

Things to Consider

4GB is considered low capacity by today's standards. Pairing it with an existing 4GB stick yields 8GB total, which is barely adequate for Windows 11 under moderate multitasking. If your laptop already has 8GB, adding another 4GB may not be worth the slot cost if you can fit a larger module instead. Also, DDR4-2400 lags behind newer DDR4-3200 and DDR5, so this module is most relevant for machines that are 5+ years old. Competitors from Kingston and SanDisk offer similar specs; Crucial's advantage lies in its direct Micron chip supply and reliable warranty support.

FAQ

Q: Which laptops can use this memory?
A: Any laptop with a DDR4 SODIMM slot. Most Intel 6th-gen and later, and AMD Ryzen notebooks are compatible. Always verify the maximum supported memory capacity and speed in your PC's manual or support website.
Q: What does single-rank mean?
A: Single-rank means memory chips are populated on only one side of the module. This reduces electrical load on the memory controller, which can be beneficial for older platforms. However, dual-rank modules sometimes offer slightly better performance in certain workloads. For a 4GB module, single-rank is the standard design.
Q: Is this module better than generic unbranded memory?
A: Yes, because Crucial has verified compatibility across a wide range of systems and provides a limited lifetime warranty. Generic modules often lack such support and may have less stringent testing. If reliability matters to you, Crucial is a safe bet.

Product Disclosure (Amazon)

  • Manufacturer: SAFAVIEH
  • Seller: Amazon US
  • Fulfilled by: Amazon US
  • ASIN: B019FRDKWI
  • Note: This article covers a manufacturer-made product based on Amazon listing details.