How Much Electricity Does A Computer Use?

How Much Electricity Does A Computer Use?

What is the PC (Personal Computer) power consumption in your home? To find out for sure, you have to open the computer case and see it on the sticker attached to the power supply. The value of power consumption is indicated by specifications such as the following example:


115 / 230V ~ 5 / 2.5A 50 / 60Hz

That is, the power consumption for operating the CPU on a home with a different default voltage is the same, namely:

  • At 110V the house voltage is 115V ~ 5A, so the computer will operate at 115V with a power consumption of 5 Amperes or equal to 115 x 5 = 575 Watts per hour.
  • At home voltage 220V is 230V ~ 2.5A, so the computer will operate at 230V with a power consumption of 2.5 Amperes or equal to 230 x 2.5 = 575 Watt per hour.

So, the power supply will change the incoming voltage according to the specifications required automatically to get a power of 575 Watt. What is the purpose of changing the power supply voltage first power consumption to 115 Volts or 230 Volts? Well, it depends. This power supply has a role similar to an adapter on a laptop. Power consumption by the power supply will be changed so that it can be accepted by components installed on the CPU box. In the past, components that were usually connected directly to the power supply were monitors, hard drives, disk drives, optical drives, processor fans, and motherboards. At present, there may be components other than those mentioned earlier so the contents inside the CPU causes the different needs of power because each hardware has its own need. On a properly assembled computer, the total power consumption of all the components in the CPU casing must be smaller or (maximum) equal to the output power of the power supply. This understanding is not known by many users (users).

In practice, many computer assemblers do not take these conditions into account. The act of “upgrading” certain components, such as memory chips, hard drives, and processors, can cause irregularities in overall computer performance like upgrading the memory chip, processor, video graphics card, etc. We as users, generally do not understand or know the extent to which upgrades can be allowed. While the party that assembles will usually comply with user requests as long as they can still be applied.


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