aqibzahid11 :
Hello guys i have 600w power supply and was wondering that is it constantly sucking 600 watt from the socket or only using the electricity that my pc needs.?
If the power supply was 100% efficient (none currently exist), it would pull exactly the amount your computer would need. However, since the power supply is not 100% efficient, it will pull the amount you need and a bit more as waste heat.
so you are saying that if my pc needs 200 wattage than psu will be using a bit more than 200 watt and not 600 watt.
Casey