For anyone else, here is a primer...
The efficiency is the PS conversion efficiency  to make 600W available for the PC, it takes from the electrical outlet 600/0.87=690W=0.69kW. So that's your full power bill, you don't pay just the losses in the PS. 0.69kWh per every hour of mining. 16.56kWh per every day. 5895 kWh per year. I am paying approx $0.1/kWh (10 cents), so that would be $589. Of course if your rig uses less than 600W, numbers scale down.
The efficiency is the PS conversion efficiency  to make 600W available for the PC, it takes from the electrical outlet 600/0.87=690W=0.69kW. So that's your full power bill, you don't pay just the losses in the PS. 0.69kWh per every hour of mining. 16.56kWh per every day. 5895 kWh per year. I am paying approx $0.1/kWh (10 cents), so that would be $589. Of course if your rig uses less than 600W, numbers scale down.
If anyone would like to have.
Gaming (Hours Per Week)
Wattage: 600
Efficiency: 87.00%
Hours/ Week: 168
Weeks / Year: 52.18
Hours / Year: 8,766.00
KwHrs / Year: 6,045.52
Cost of KwHr: $0.24
Cost per Year: $1,450.92
Mining (Hours Per Day)
Wattage: 600
Efficiency: 87.00%
Hours/ Day 24
Days / Year: 365.25
Hours / Year 8,766.00
KwHrs / Year 6,045.52
Cost of KwHr $0.24
Cost per Year $1,450.92
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