Question Pc save electricity

[Reiichi]

So i gave my father my old pc, and with his older pc he would plug out the psu cable whenever he was not using his pc
now he's curious with said new pc if it's gonna destroy the components if he removes psu cord from electricity or flip the electricity switch when not using the pc anymore.
As to save electricity

 

[boju]

It is recommended to disconnect power completely when going away or even if there are electrical storms about. There's no risk damaging electronics doing so.

 

[zinkles]

So i gave my father my old pc, and with his older pc he would plug out the psu cable whenever he was not using his pc
now he's curious with said new pc if it's gonna destroy the components if he removes psu cord from electricity or flip the electricity switch when not using the pc anymore.
As to save electricity

When the PC is turned off/shut down, it wont consume any power, so removing the PSU cord wont save any electricity. Although, as the above user mentioned, its always good to unplug when there's a bad weather condition outside.

There is no risk of damaging components when unplugging the power cable, assuming the PC is fully shut down beforehand.

 

[Eximo]

When the PC is turned off/shut down, it wont consume any power, so removing the PSU cord wont save any electricity. Although, as the above user mentioned, its always good to unplug when there's a bad weather condition outside.

There is no risk of damaging components when unplugging the power cable, assuming the PC is fully shut down beforehand.

Not entirely correct.

On much much older AT power supply systems, the power switch was a physical disconnect from AC power.

For ATX computers if the computer is plugged in, the power supply switch is on, and the computer is off, then it is still consuming a standby load and producing 5V. This is the signal used by the power switch to indicate that the PSU should start up and provide all the voltages. For most recent electronics this should be a very small amount of power, maybe even less than a watt. On some boards the USB ports are still capable of providing power when the computer is off (they are usually labeled with a little power symbol or are a different color from the rest of the ports) (Always On USB ports)

If the power strip or PSU is off, then it can't consume power. For general purposes better to wear out a switch on a power strip than your electrical outlets.

 

[zinkles]

For most recent electronics this should be a very small amount of power, maybe even less than a watt.

this is purely negligible.

 

[TerryLaze]

this is purely negligible.

It is, but it's still something, also mean time between failure for components is measured in hours and no matter how small an amount of work they do this MTBE tiks down.
On old equipment that you don't use that often it's always a good idea to switch it off.

 

[geofelt]

The amount of electricity savings by unplugging a pc that is powered off is negligible.
As to reliability, I might guess that performing the mechanical action of plugging/unplugging a power cord is slightly more apt to cause damage.
Unless electricity cost is astronomic, I would not even poweroff the pc.
Use sleep to ram(no hibernate) instead.
Electric cost is minimal, and sleep/wake is only a handful of seconds.