How Much Electricity Does a Computer Use Per Hour?

Answer

The hourly use of electricity by computers is determined by the type of computer and the connected peripheral devices. Typical desktops use about 65 to 250 watts while LCD and CRT monitors use about 40 and 80 watts respectively. However, laptops and energy efficient PCs use less electricity per hour.
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How Much Electricity Does a Computer Use Per Hour?
Computers have become much more energy efficient since the early days, when electronic monsters such as the 1940s ENIAC consumed 150,000 watts of power, including 20,000 for its cooling fans. But answering the question of how much electricity a computer... More »
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