Power consumption calculation.

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flappydom

flappydom

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Mar 31, 2018
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Hello! My landlord says that he has observed an increased power consumption, so I decided to check out my laptop's consumption without buying a meter (which will be the last resort).

I have a Clevo laptop with a 17" screen, i7 6700K and GTX 980.
My adapter says Input: 100-240V 4.4A 50-60Hz.
I checked google for info, and they say that the watt number comes from Volts*Ampere.
That would mean 100*4.4=440w minimum consumption, but it sounds unreasonable.
So, based on my adapter, what is the actual minimum consumption for my laptop ?
 
Solution
kanewolf


100 -240 is the allowable VOLTAGE input. This makes the adapter universal for many countries. Your output numbers would be about 325W. Which would be about $0.05 / hour. Your landlord will never see this delta. Unless you are crypto mining. Then the $0.05 / hour * 720 hours / month would be about $36. They might notice that.
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kanewolf

kanewolf

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May 29, 2013
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How much is a kilowatt hour ? $0.15? If your laptop took 400W (which it probably doesn't, most of the time), then your laptop would add 4/10 * 0.15 == $0.06 / hour. I don't think your landlord could detect such a small change. Tell him/her to look elsewhere.
 
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flappydom

flappydom

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Mar 31, 2018
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It is 19.5V - 16.9A.
If that is peak consumption, why is there not a single number ? I thought 100 was the lowest and 240 the highest, because it says 100-240.
 
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kanewolf

kanewolf

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May 29, 2013
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100 -240 is the allowable VOLTAGE input. This makes the adapter universal for many countries. Your output numbers would be about 325W. Which would be about $0.05 / hour. Your landlord will never see this delta. Unless you are crypto mining. Then the $0.05 / hour * 720 hours / month would be about $36. They might notice that.
 
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Solution
InvalidError

InvalidError

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May 18, 2007
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Because input specifications and output specifications are not the same thing, different parameters have different acceptable ranges, some parameters are related to other parameters such as input current and voltage which are inversely related to each other and proportional with load, etc.

There are many numbers because those numbers are needed for different reasons. The input voltage range is needed to know where the adapter can be used in terms of input voltage and frequency compatibility. Maximum input current is needed if you want to troubleshoot why breakers are tripping. Output voltage is needed to know what you can connect to the adapter without blowing it up due to over-voltage. Output current is needed to know what the highest load the adapter can provide at its nominal output voltage, etc.
 
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