Having trouble with Electricity Calculating

[DMDComposer]

Hi I'm new to mining and just want to estimate my electric bill going up which my bill atm is 5.09 cents k/Wh.

I'm confused whether I should be calculating the power usage of my Gtx 1070ti at 180 watts (according to just googling I actually have no idea how to figure what I'm using) for 24 hours at my electric bill  5.09 cents a k/Wh  which for 30 days is $6.69

or

should be estimating my full pc's psu which is 850 watts for 24 hours at my electric bill  5.09 cents a k/Wh  which for 30 days is $31.60


Also if I reduce the power limit from 100% to 70% is that reducing the power wattage too so instead of 180 watts it would be 126 watts?

Thanks!

[1714111103]

1714111103

[MinerMEDIC]

The only sure-fire way to assess your energy consumption is to use a kill-a-watt style receptacle power meter. Your power supply may be capable of a 850 Watt output but there's no such thing as a 100% efficient power supply so it's going to take more energy to produce that. In other words a 90% efficient power supply will consume 935W to give you a 850W output(never run a power supply at its absolute maximum value for extended periods). Calculation cannot be done by hand unless you know the power supplies' efficiency and even that should be something of a curve depending on your output, so there you go.