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PC wattage consumption

post #1 of 11
Thread Starter 
Ok I am a little confused on this. I have a 500watt PSU, so does that mean I am using up 500watts of electricity every moment I have my rig on? Or does it only use a portion of it and use all 500watts when gaming, etc?
post #2 of 11
Quote:
Originally Posted by wudaddy
Ok I am a little confused on this. I have a 500watt PSU, so does that mean I am using up 500watts of electricity every moment I have my rig on? Or does it only use a portion of it and use all 500watts when gaming, etc?
No. I have a 480watt PSU and have it hooked up to a UPS backup battery. This backup battery has a load meter that tells what percentage of power is being used at the moment. It sometimes goes from 20% to over 50%. 50% use is usually when i am gaming or doing something cpu and gpu intensive, so to answer this question, no the computer isn't using 500 watts at all times.
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post #3 of 11
Thread Starter 
Quote:
Originally Posted by funkycasey
No. I have a 480watt PSU and have it hooked up to a UPS backup battery. This backup battery has a load meter that tells what percentage of power is being used at the moment. It sometimes goes from 20% to over 50%. 50% use is usually when i am gaming or doing something cpu and gpu intensive, so to answer this question, no the computer isn't using 500 watts at all times.
Alright man, thanks for clearing it up. I can finally sleep at peace when I know that my PC isn't using 500watts constantly when I leave it on overnight. So I only use like 200watts most of the time right?
post #4 of 11
Quote:
Originally Posted by wudaddy
Alright man, thanks for clearing it up. I can finally sleep at peace when I know that my PC isn't using 500watts constantly when I leave it on overnight. So I only use like 200watts most of the time right?

If it's idle...way less than that actually....
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post #5 of 11
Quote:
Originally Posted by wudaddy
Alright man, thanks for clearing it up. I can finally sleep at peace when I know that my PC isn't using 500watts constantly when I leave it on overnight. So I only use like 200watts most of the time right?
Somewhere around that probably...I know your feeling..my mom hates when i leave my computers on all day...my old dell has a 180 psu on it and it probably only draws 100 as long as my cd drive and hard drive aren't being used much
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post #6 of 11
My video card is currently absent but my overclocked rig uses 60W idle and 125W load. I have a very efficient power supply though.
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post #7 of 11
A power supply delivers the amps that the consumer (PC in this case) demands. The wattage is just the upper limit.

Basically it just transforms the current, and passes it on per demand. A bit is "wasted" in the process, and released as heat.
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post #8 of 11
Actually, a power supply transforms voltage and current. Ohm's Law P=IE. As voltage decreases (120V>12V) current increases proportionally. A 100% efficient 1000W power supply at full load will draw ~ 8 1/3 Amps @ 120V from the source (wall outlet) and will supply (for the sake of simplicity let's say it only has 12V output) 83 1/3 Amps. This is the simplest calculation and does not take into account losses due to resistance, inductance, or capacitance that will occur in the internal circuitry.
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post #9 of 11
Set up an FAQ on the question of if your computer always uses the max rated wattage... My first faq
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The Crushanator
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post #10 of 11
Quote:
Originally Posted by wudaddy
I can finally sleep at peace when I know that my PC isn't using 500watts constantly when I leave it on overnight.

If you got it folding you would be using more but not wasting any

How come you leave it on all the time if you're not folding with it?
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