it says it delivers 19.5 volts at 10 amps... that's 190 watts, or 16.25 amps at 12 volts.

Now this is for one of the Dell Precision Workstations, with a 17 inch screen... but you have to figure that even the smaller computers are going to draw something like 140 watts, or close to 12 amps at 12 volts... at least some time during their use. Granted, if you are just sitting there typing the next great novel, you probably are not taxing the CPU much.

I know when I do email or browse the web, the fan never kicks on... but when I do CAD work, that fan is going for all it's worth. You have to be prepared for the peak power surges.