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Originally Posted by imagex
Does anyone here know if a "500 watt" atx power supply realy pulls 500 watts @ 110 volts??  See I'm on this power kick since my bills like $350 a month and started looking into solar and make/saving power, well in my learning I found out how to find how many watt hours things use and how much they cost a month and if all 13 of my pc's here are costing $28 a month each to use looks like foldings only going to happen during the day  so far I've added a few solar pv cells and deep cycle batteries for 12 lighting in my shop , a exercise bike rigged with a 60 amp 12 volt altanator for the ol'lady and 100 gallon batch water heater,lol I sure hope these power supply dont realy pull that much I was doing so good |
The power supply won't pull 500watts unless your computer needs it. It will only pull as much as necessary (plus a little bit due to inefficiency). So, if you really wanted to get an exact measure on how many watts your rig requires, you could look up the specs of all the hardware, like hard drives, cd-rom drives, etc. They usually state how many amps they take from the 5V and 12V rails. Then add them all up.
--Ferdi