how much a 300 watt pc cost me every month

[tealess]

how much will a 300 watt pc cost me every month if i turn it on for 12 hour a day

 

[ccampy]

Doing what watch movies playing games e-mail? A PC only draws the power it needs so power use depends on what your doing

 

[tealess]

Doing what watch movies playing games e-mail? A PC only draws the power it needs so power use depends on what your doing

play game and watch youtube

 

[hang-the-9]

how much will a 300 watt pc cost me every month if i turn it on for 12 hour a day

This depends on how much your power costs.

At full power, .10 cents per kwh, looks to be $131 a year for 12 hour full use fr 300w.
I doubt you are running the thing at full load for 12 hours though, and it will not use 300w anyway all that time even at full load. You are probably spending $30 a year on it.

http://www.electricity-usage.com/Electricity-Usage-Calculator.aspx?Device=Computer+System&Watts=300&CostPerKWH=0.10&HoursPerDay=12