How do you know the power draw of your PC (gaming pc and otherwise)

KaiserPhantasma

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Nov 16, 2013
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just curious how you get those readings and where you get "you must get x amount of wattage for your set-up"

and also how do you know how much wattage a vid card needs without looking at pcpartpicker?
 

KaiserPhantasma

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Nov 16, 2013
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no minus looking at benchmarks and such im curious where people get the "you need x amount of wattage to power this x number of vid cards"

I can see "minimum wattage requirement" from boxes but it doesn't tell "x wattage for sli/crossfire"