>> Is there actually a tangible difference in a person's electric bill (due
>> to less energy actually being consumed) when they run a low-CPU program
>> over the course of two hours vs. running a CPU-intensive program over
>> the course of two hours?
> 
> Yes. But don't tell my mom, or she will make me stop my 24/7 100% CPU usage 
> (she pays the electricity bill).

Last time I clocked it, having my PC running uses about 200W. So, about 
the same as two light bulbs.

The kettle, on the other hand, uses OVER THREE THOUSAND WATTS of power. o_O

(I also noted little or no difference in power usage between an idle PC 
doing nothing and the same PC with the CPU and GPU both maxed out. 
Although I have a bigger GPU now...)

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