power consumption

Discussion in 'General Electronics Chat' started by vustudent, Nov 7, 2009.

  1. vustudent

    Thread Starter Active Member

    Mar 11, 2009
    38
    0
    Does a plugged in, but powered off computer consumes energy?
     
  2. ELECTRONERD

    Senior Member

    May 26, 2009
    1,146
    16
    Yes it does. One of the computers I have will have this LED inside it glow even though the computer is powered off.

    It's almost like a wall-wart or adapter; it's plugged in but there is still power dissipation across the transformer, rectification diodes, and filteration caps. But the power consumption isn't very much, it will significantly increase when a load is applied.

    Austin
     
  3. bountyhunter

    Well-Known Member

    Sep 7, 2009
    2,498
    507
    Yes. You also have a clock and some RAM to keep going. It draws a little bit when it's off.
     
  4. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    A portion of the power supply (a "pilot" 5v supply for ATX form factor) is always running, even when it's turned off.
     
Loading...