I’m not sure how the math works for percentage or why you’d want use it. I’m converting half of 75 watts of TDP to kW because the utility charges in kWh. Even my low-power card wasn’t running at 3.7 watts. It was running 10-30 w.
If the math were done with your calculation on a computer that pulls 500watt around the clock the cost would be astronomical - 500*24*365*.45 = $1,971,000, Wow it would cost almost 2 million a year to run that computer! And almost $164,250 a month to run that is one hefty power bill
However if you do it using percentage it would be .05*24*365*.45=$197.1 a year for the same computer...... The decimal point makes all the difference.
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