This article covers Crucial [Micron製] DDR4 ノート用メモリー 8GB (2133MT.

Overview

The Crucial CT8G4SFD8213 is an 8GB DDR4 SODIMM memory module designed for laptops and small-form-factor PCs. It operates at 2133MT/s (PC4-17000) with CAS latency CL15 and uses a 260-pin unbuffered design. Built with Micron DR chips, it offers reliable performance and low power consumption for entry-level systems. This memory is ideal for upgrading older laptops that support DDR4 but do not require high-speed modules.

Compatibility Guide

This module uses the 260-pin SODIMM form factor, which fits standard laptop memory slots, Mini PCs, and Intel NUCs. It is not compatible with desktop DIMM slots. It supports only DDR4 standard at 1.2V, with timings of 15-15-15-35. The maximum supported speed is 2133MT/s; if installed in a system that supports higher DDR4 speeds (e.g., 2400MHz or 3200MHz), it will downclock to 2133MHz. Ensure your motherboard or laptop chipset officially supports DDR4 memory (not DDR3 or DDR5).

Product Info

The Crucial CT8G4SFD8213 is an entry-level DDR4 SODIMM released around 2015. It is widely available through retailers like at approximately ¥13,000–14,000 (as of June 2026). The module comes with a limited lifetime warranty. Its market position is budget-oriented, suitable for legacy system upgrades rather than high-performance gaming or multitasking.

Best Use Cases

Legacy laptop upgrades: Perfect for 2015–2017 laptops that only support DDR4-2133. Adding this 8GB stick can significantly improve responsiveness for everyday tasks like web browsing and office productivity. Cost-sensitive builds: If you're refurbishing a second-hand laptop or building a low-power Mini PC where budget is the priority, this affordable module gets the job done without breaking the bank. * Compatibility-critical environments: Crucial's RAM has extensive validation for many OEM systems. If you need a safe, drop-in replacement for an existing DDR4-2133 SODIMM, this is a trusted choice. ## Alternatives
Direct competitors include the Kingston KVR21S15S8/8 (8GB DDR4-2133 SODIMM) and Samsung M471A1K43CB1-CRC (8GB DDR4-2133 SODIMM). Kingston is slightly cheaper but may have fewer validated motherboards. Samsung is often used as OEM memory and offers high reliability. Crucial strikes a good balance between price and compatibility. However, if your system supports DDR4-2400 or higher, consider faster modules like Crucial's own CT8G4SFS824A (DDR4-2400) for better bandwidth.

Things to Consider

The main limitation is the low speed: 2133MT/s is significantly slower than modern DDR4-3200 or DDR5. If you install it in a newer laptop that supports faster memory, you will not get the full performance the CPU can deliver. Also, 8GB is becoming minimal for modern multitasking; consider using two sticks for 16GB dual-channel if your system has two slots. Finally, some ultra-thin laptops have soldered memory and no SODIMM slots, so verify your system's upgradability before purchasing.

Product Disclosure (Amazon)

  • Manufacturer: Crucial(クルーシャル)
  • Seller: Paramount Ram Japan
  • Fulfilled by: Paramount Ram Japan
  • ASIN: B015HQ9TGW
  • Note: This article covers a manufacturer-made product based on Amazon listing details.