psu question

Discussion in 'OT Technology' started by mustang5oh, Mar 21, 2005.

  1. mustang5oh

    mustang5oh New Member

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    Alexandria, Va-DC metro
    My question, Does a power supply always draw the same power from your ac outlet( ie electric bill), or does it only draw what is needed? so if i have a 650 watt psu on something that doesnt use anywhere near the power of it, does it draw less? or does it draw the same from the ac, but it is just terminated. Cause my system runs fine right now with a 500watt, but i wanna upgrade to a 680watt because of all the pretty wires n stuff lol. So, since i am not changing anything else in the system,, will my electric bill be the same?
     
  2. Goonigoogoo

    Goonigoogoo Active Member

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    Only draws what is needed, so typically with a 650W home PC you can use many components to power up, including non-poweed USB devices and such.
     
  3. P07r0457

    P07r0457 New Member

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    assuming a 250W psu could support your system, a 650W psu would use no additional "power" to drive the same system.
     

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