Key Specifications Analysis:

1. Capacity: 8GB

2. Type: DDR4 SDRAM

3. Speed: 2666 MT/s (Often labeled as PC4-21300. Here, “2666” refers to the data transfer rate.)

4. Timing: Typically CL19, but specific timing may vary by batch. The suffix -CTD determines minor variations in timing and voltage.

5. Operating Voltage: 1.2V (Standard DDR4 voltage)

6. Memory Chips: Uses high-quality Samsung original memory chips.

7. Form Factor: 260-pin SODIMM (Laptop memory module)

8. ECC/Registered: Non-ECC, Unbuffered (Standard consumer-grade memory)

About the Model Suffix “-CTD”:

In Samsung’s coding system, the suffix letters are important:

• C: Usually represents a specific internal revision or production code.

• T: Often represents the combination of “1.2V” voltage and “2666” speed.

• D: Usually represents a timing of CL19.

Therefore, M474A1K43BB1-CTD can be understood as: Samsung 8GB DDR4-2666 CL19 1.2V Laptop Memory.

Usage and Compatibility:

• Upgrade: Very suitable for increasing memory capacity or setting up dual-channel configurations for older laptops. For example, many laptops from around 2016 to 2021 (equipped with Intel 6th to 11th Gen Core, or AMD Ryzen mobile processors) use DDR4-2666 memory.

• Pairing / Dual Channel:

  • For best performance, it is recommended to pair it with an exactly identical model.

  • If an identical model cannot be found, try to match capacity, speed, timing, and voltage. Using another Samsung DDR4-2666 CL19 8GB SODIMM module should usually be compatible.

• Note: Before upgrading, be sure to check your laptop for:

  1. Available memory slots.

  2. The speed of the original memory (and the maximum supported speed). Some computers may downclock higher-frequency memory.

  3. Maximum supported capacity (e.g., some motherboards max out at 16GB, while others support 32GB or more).

How to Confirm?

• Use hardware detection software (such as CPU-Z, check the “Memory” and “SPD” tabs).

• Check the official specifications or user manual of your laptop.

Summary:

M474A1K43BB1-CTD is a reliable and stable Samsung original 8GB DDR4-2666 laptop memory module. It is a cost-effective and reliable choice for upgrading older laptops. It is also commonly found in the second-hand market (e.g., Xianyu). When purchasing, be cautious of counterfeits and choose reputable sellers.