What is the power of a typical laptop? About how much w?

1. The power of a general notebook computer is in the range of 40W-70W.

In fact, the power consumption of notebook is not a fixed value, and there will be great differences between different computers, such as the high point of independent graphics card and the high level of quad-core relative to dual-core

Generally speaking, the voltage and current of the notebook will be marked on the back of the external power transformer of the notebook. According to this value, the voltage multiplied by the current can get the power of the notebook. For example, the voltage of a notebook computer is 19V, and the current is 3.42 amps. 19 x? 3.42=64.98W, and the result is the power of this notebook.

This figure is the theoretical power consumption value of the notebook. Different states of notebooks lead to different power consumption. For example, standby power consumption is much smaller than working power consumption.

2. The power consumption of the notebook can be reduced by the following methods.

(1) Lower the brightness of the notebook display screen appropriately.

(2) Clean up programs that are not commonly used in the notebook, especially programs that will start automatically when turned on. If it is not commonly used, it is recommended to delete it.

(3) During use, programs that have not been used for a long time should be closed immediately.

(4) When you are not watching videos, quit the application and try not to download movies and some big files in your notes.

(5) Don't always plug external devices such as mobile phones or USB flash drives into the notebook when not in use.

Extended data

Main aspects of notebook computer power consumption

1, LCD screen: This is the most important aspect of notebook power consumption. The power consumption of LCD mainly comes from its backlight tube. With the increase of brightness, the power consumption rises rapidly. The size and resolution of the display will also affect the power consumption. The larger the display screen, the higher the resolution and the more impressive the power consumption. On average, the LCD screen accounts for about 1/3 of the total power consumption of notebooks.

2. Graphics card: Compared with integrated graphics card, discrete graphics card consumes more power.

3.CPU: Unlike the relatively fixed power consumption of LCD, the power consumption of CPU increases with the increase of working pressure. In general office applications, it accounts for about 8%- 15% of the total power consumption.

4. Hard disk and optical drive: average 10% of total power consumption.

5. Cooling system: As the workload of CPU and graphics card increases, its calorific value will also increase accordingly, and the cooling system consumes more power.

6. Network and peripheral interfaces: The power consumption of wireless network cards can not be ignored. Others, such as USB port, generally consume about 5 watts when connecting devices, which is also considerable; The power consumption of sound card is also improved obviously when games and DVDs are played.

References:

Notebook _ Baidu Encyclopedia