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power supply electricity usage rates

Posted on 2004-03-29
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Last Modified: 2010-04-25
As a computer technician, I buy what I think are AT and ATX power supplies that have "enough" wattage to handle most userss computers -- usually I get 250 - 350 watt units in case I need one for a customer.

Question is, if I put a 350 Watt power supply into a computer that was using a 170 Watt supply before it broke, will it use more power?  The obvious answer seems "yes", but, I know the computer only uses a small bit of the power coming into the system...anyone with electricity background probably knows the answer offhandedly.  An answer with a little information would be nice.  Thanks a lot.
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Question by:mark_at_acc
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Callandor earned 250 total points
ID: 10707533
Putting a higher power-rated supply in place of a lower-rated supply does not mean it's going to use more electricity.  The ratings are for how much total wattage the supply is capable of putting out without dying or losing regulation on the voltage rails.  A higher-rated supply will be able to handle larger loads when they happen; it doesn't mean they will use more power.
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by:mark_at_acc
ID: 10707779
Sounds good, thank you.
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