How Much Power does a Computer Use?

A computer can user anywhere from 65 watts up to 250 watts of power. The watt usage depends on the speed of the processor and what additional items you are using, such as a monitor and its size, or a printer or a scanner. Even having a web cam will increase your watt usage. If you are worried about the cost of leaving your computer on when not in use, consider using standby mode which uses the least about of energy.