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Unused wattage for Power supply?

gleggie
By gleggie
in Power Supplies
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Go to solution Solved by STRMfrmXMN,

So I have a 750 watt power supply, but the only reason why I got it over a 500 watt or 600 watt was that it was the same price for more power.  However, I don't really need that much power, I probably only need about 450 Watts.  Is the computer always still drawing 750 watts and wasting it?  Or is it only drawing what it needs from the wall?

A PSU only donates as much power as needed. It sucks a bit more than that from the wall because of efficiency, but it never delivers more power than is asked of it.

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So I have a 750 watt power supply, but the only reason why I got it over a 500 watt or 600 watt was that it was the same price for more power.  However, I don't really need that much power, I probably only need about 450 Watts.  Is the computer always still drawing 750 watts and wasting it?  Or is it only drawing what it needs from the wall?

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no you are only losing efficiency. It draws as much as it needs

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  • Solution

So I have a 750 watt power supply, but the only reason why I got it over a 500 watt or 600 watt was that it was the same price for more power.  However, I don't really need that much power, I probably only need about 450 Watts.  Is the computer always still drawing 750 watts and wasting it?  Or is it only drawing what it needs from the wall?

A PSU only donates as much power as needed. It sucks a bit more than that from the wall because of efficiency, but it never delivers more power than is asked of it.

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Never buy based on wattage. buy based on quality
if it was the same price chances are you got a lower quality PSU for your needs.

worse capacitors etc.

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Never buy based on wattage. buy based on quality

if it was the same price chances are you got a lower quality PSU for your needs.

worse capacitors etc.

THIS. Also to add, to buy based on quality, check reviews on sites like tomshardware and jonnyguru.

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