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The amount of electricity a computer uses depends on the equipment and applications used, typically ranging from 65-250 watts for the computer and 35-80 watts for the monitor. Faster processors and certain tasks increase consumption, while LCD monitors use less than CRT. Standby mode uses 6 watts, and laptops use 15-45 watts, making them an energy-saving option. A screensaver does not save energy.
Determining how much electricity a computer uses can be a somewhat complicated task, as it depends on the type of equipment a person has and the applications they are running. Typically, the amount of electricity a computer uses is between 65 watts and 250 watts. The monitor also often requires between 35 watts and 80 watts. Most desktop computers have a label listing the amount of power needed, but this is generally the theoretical maximum and not an average representation.
Desktop computers with faster processors consume more electricity than computers with slower ones. However, LCD monitors only use about half as much as similarly sized CRT monitors. Accessories and peripherals, such as cable modems, routers, or webcams, also contribute to a slight increase in the amount of energy a computer uses.
Regardless of the type of computer a person owns, the type of work they do on that computer makes a difference in electricity consumption. Using a computer to edit digital images, design a website, or play a video game requires more power than reading email or completing simple word processing tasks. Also, the amount of electricity a computer uses increases dramatically when connected to the Internet.
A common misconception is that using a screensaver saves energy, but this is not true. Its moving image series is meant to protect the screen from having a static image ingrained in it.
People concerned about high bills will find that a better option is to leave the computer in stand-by mode when not in use. In standby mode, a computer uses approximately 6 watts of electricity and the monitor’s power consumption is reduced to almost zero. Of course, it’s still cheaper to shut down your computer completely when it’s not going to be used for several hours at a time.
Although many people prefer laptops due to their greater convenience, it is interesting to note that a laptop computer can also be very energy saving. Most laptops use between 15 watts and 45 watts. Switching to a laptop can be a smart decision for anyone concerned about how much energy a computer uses.
