How Much Power Does a Computer Use

With the constant rise in electricity prices, it would be good to know how much electricity various devices use. The typical PC power consumption aspect concerns many people who constantly use PCs, laptops, or gaming devices. This information will help to significantly reduce PC power consumption in the future and save your money on more important things. In addition, we will tell you about how to reduce the computer’s electricity and other useful things that may be useful to you.

How Much Electricity Does My Computer Use?

To decide how much to spend on an energy-efficient gaming PC, you shouldn’t study the power supply in search of the required value. When calculating, it should be taken into account that electricity is consumed by all components of the computer and its peripheral devices. In addition, the nature of the use of the PC also affects the consumption of electricity.

System Unit Consumption

You can find out how much energy the system consumes from the technical documentation attached to the computer. Indeed, in fact, its maximum possible power consumption is the voltafe of the power supply, since it is from it that all the components that make up the system unit and some peripheral devices are powered. Power supply capacity varies from about 300 watts per hour on simple PCs and up to 1600 watts per hour or more on powerful gaming machines. But you should know that these are the values ​​that the power supply can give, and not how much the computer actually consumes. In fact, in order to find out exactly how much electricity a personal computer consumes, it is necessary to sum up the energy consumption of all of its components. The most active consumers are the processor and video card.


The consumption of electricity by a motherboard depends directly on the capabilities built into it by the manufacturer. On average, it needs 20-35 watts to power it, but if coolers, a graphics processor, a sound card, and other elements are connected to it, its power consumption increases significantly.


Processor performance – this parameter determines gaming PC power consumption, also non-gaming computers and how much it will consume. Dual-core processors operating at low frequencies will consume much less than eight-core ones. But it should also be borne in mind that the old options are always more energy-consuming. For example, a quad-core Intel Core i5 consumes up to 140 watts of electricity, while an Intel Quad Core at maximum load consumes more than 200 watts. But dual-core AMD consumes on average from 65 to 95 watts, while more powerful versions of this manufacturer consume about 95 to 125 watts per hour.

Video Card

In a video card, as in a processor, power consumption directly depends on the gaming PC wattage. High-performance devices under heavy loads consume an average of 240 to 350 watts per hour, and in idle mode, their consumption varies from 35 to 55 watts. But since the video card isn’t always used at full capacity, the power consumption for its operation ison average from 100 to 300 watts.

Hard Drive Or SSD

Hard disk: The average power consumption of a conventional hard disk ranges from 0.7 to 6 watts, while more modern SSDs consume less – from 0.6 to 3 watts per hour.

Optical Drive

Under load, the optical drive consumes an average of 27 watts of power, while in idle mode it consumes no more than 15 watts power consumption of a computer per hour.


The computer cooling system draws on itself from about 0.6 to 6 watts of electricity, while it should be borne in mind that the fans are running constantly, and as a rule, any stationary computer includes several coolers.


To answer the question of how much electricity the computer peripherals take on, look at the numbers indicated in their technical characteristics or on the factory stickers attached to them from the back or bottom. It should be noted that the monitor operates directly from the network and consumes approximately 18 W and more, depending on the model. And the power consumption of other devices, such as a webcam, speakers, headphones, keyboard, and mouse, comes from the interfaces of the system unit, and therefore their power consumption won’t exceed the specified maximum strength of the power supply. By the way, the speakers can also be powered directly from the 220 V.

How Much Energy Does a Laptop Use?

How Much Energy Does a Laptop Use

Many worry about computer energy consumption. At the same time, many may not turn off their laptop at all for days. But laptop electricity usage can also be higher. Of course, the typical consumption can be approximately equal to that of an LED lamp. But still, the electricity consumption of a laptop can depend on factors such as:

  • screen diagonal;
  • internal components (video card, processor, etc.);
  • the intensity of its work.

Many 15 “devices are rated at 45 watts, while 17” devices are rated at 65 watts laptop electricity consumption per hour . If the power isn’t indicated, it is recognized by multiplying the output voltage of the power supply V by the amperage A. For example: 20 * 3.25 = 65 W. A gaming laptop can consume 170 watts of or more. In terms of gluttony, an office laptop can be compared to an incandescent light bulb, a gaming laptop – to a stationary budget device. So you now understand that a static electricity laptop will depend on how often you use it, for what and what is inside it.

Do Gaming Computers Use a Lot of Electricity?

Do Gaming Computers Use a Lot of Electricity

Do gaming PCs use a lot of electricity? Many gamers ask that question, and the answer is yes, they consume significantly more power than a regular PC with standard settings. Calculating which possibility here will be much more difficult. But this can be calculated using load testing. Imagine, when playing simple modern games with maximum settings, the device can produce values ​​even higher than 400 watts.

Let’s take a computer with good gaming capabilities and one video card as an example of calculating PC electricity consumption.

  1. We check the power consumption in normal screen mode without starting any programs (about 140 W).
  2. Download and use video rendering (240W).
  3. Launch the game and start playing. In this case, the rendering doesn’t stop (400 W or more).
  4. We continue the game, but turn off the rendering (300 W).

If you use your PC exclusively for games, and let’s say you play 5 hours daily, as a result, desktop computer power consumption will be about 45 kW per month. You also need to remember the monitor. It will take 6-7 kW per month. That is, in total, all this consumes 51 kW of energy.

But besides that, don’t forget that computers can break down, and static electricity can also damage them. There are a lot of types of damage static electricity can cause in computers, depending on the situation. For example, if there is a carpet under you, and you are wearing socks, then the friction of these fabrics can cause electrons. In general, it doesn’t have much of an impact on your computer. But still, if after that you touch the open parts and systems of the computer, it can harm them. In addition, power consumption may also increase. Accordingly, it is better to remove all kinds of energy sources that can extra electrons. Or at least avoid contact with them.

Here are some tips to help you reduce the power consumption of your PC or laptop:

  1. Give preference to energy-efficient options.
  2. Set the optimal power supply parameters in the PC settings.
  3. Turn off your PC when not in use.
  4. Don’t set the monitor’s brightness to maximum, and, if possible, turn it off when the computer is idle.
  5. Replace old components with new, more efficient ones.
  6. Use less powerful laptops if there is no urgent need for a powerful desktop computer.

Now you certainly know everything you need to know about static electricity and computers. This information can really be useful, even to find out possible problems with the operation of your device. And if you notice that your PC electricity usage is high, then now you know how to fix it. We recommend using our recommendations so that there are fewer problems in this aspect. And with this you can easily cope without a specialist. Good luck!

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