[quote name='SpazX']Haha, well they basically use the same amount of energy a computer would, but hopefully they're not used as often. With that you'd have to take into account the TV and stereo system too, depending on what you have hooked up. So if you have a decent sized LCD TV and a moderate stereo system I would guess you'd be using about 500-600 Watts for every hour you game. So if you extrapolate that to around 3 hours a day for 30 days then you get about 45-55 kWh a month, which at a 15 cent rate would be $7-$8 a month.
If you game the same amount on your PC you'll probably draw around that same amount of power per hour, depending on your set up.
I wasn't really thinking about the monitor with the PC in that earlier example, so maybe $4-$5 a month for the computer. I think I underestimated it for running 24/7 though, depending in what you do with it, it could probably cost $10-$15 a month if left on all the time and it's pulling around 100-150W when idle. I really don't know how much power an idle PC generally requires, but it's probably best to just cut the thing off, could save you at least $2-$3 a month.[/quote]
I actually have 2 computers - one is a HTPC and one is my main comp. My main comp has 4 hard drives, a decent video card, a dvd burner. Using
this calculator, it seems I would need at MAX a 360 watt PSU. (I think I have 450 but it should never require more than 360). Using that, if left on all day, it costs $1.25/day - using it for 31 days is $38. Yikes! I have decided on 8 hours a day, or 41 cents, or about $12 a month. Much better.
My HTPC uses a low power CPU (45 watt), has 1 HDD, a BD/HD-DVD player, and a tv tuner. Uses 240 Watts max. 8 hours is 28 cents, or about $9 a month. I don't think either computer ever gets up to max wattage though, since I know I run my regular pc a LOT. Of course it might have made up the majority of the electricity bill.
If my math is off, let me know - I'd much rather like to pay $5 for my pc than $40!
Oh, and yah the lcd screen uses hardly anything - as does an lcd tv (which we have and use the most). LCD screen and tvs don't seem to show wattage, but it seems you can take Volts*Amps to get watts; my monitor is 1.5 amps and 120v (right?), so 180 watts, or 21 cents for 8 hours, or $6.50 for a month. I run my monitor probably a few hours each day though (usually turn it off while computer is on).