Plase forgive the ignorance of this question. Up till recently, I had thought that power supplies "burned" current "as needed", meaning, if you have a 400 watt power supply, and the components it's powering only require 300, that's how much energy you'll use. Recently, someone told me that wasn't the case, claiming the rating was a like a light bulb, meaning if it's rated for 400 watts, that's how much power it burns all the time. That pretty much goes against what I thought I understood about electronics, but this guy seems like he would know better than I. Anyways, is this the case, that a 400 watt power supply always burns 400 watts? thanks!
<i>8088 4.77 mhz
640k RAM
CGA, 12" monitor
20mb mfm harddrive
PC Speaker, DOS 2.0</i>
<i>8088 4.77 mhz
640k RAM
CGA, 12" monitor
20mb mfm harddrive
PC Speaker, DOS 2.0</i>