Do computer components draw more amperage when hot?
Using the amperage in your question, the power used when the system is hot would be minimal, perhaps a couple of milliamps. Listed Wattage would be calculated under power and as you are not doing any more actual work according to the formula P = I x V. The big worry should be when you have reduced voltage going to a device. Normally this is not an issue at home but in manufacturing environments when the voltage goes down, current must increase to keep the power required to do the work. In this case the amperage would increase dramatically causing severe heating and component failure. But then again we are talking about a 30% decrease in voltage for something like this to happen.
