Does this case use that many watts?

Solution
The case has a built-in fan controller. The fan controller has 5 channels each can handle up to 20w. Most case fans are less than 5w each. So if you hook up one fan to each controller channel (5 fans total) you would only be using 5w per channel for a total of 25w. You can add additional fans to each channel by using a fan splitter but don't get too crazy with it. So the answer is: No, it won't be a constant 100w, it will be whatever the total is of the fans you connect to it.
The case has a built-in fan controller. The fan controller has 5 channels each can handle up to 20w. Most case fans are less than 5w each. So if you hook up one fan to each controller channel (5 fans total) you would only be using 5w per channel for a total of 25w. You can add additional fans to each channel by using a fan splitter but don't get too crazy with it. So the answer is: No, it won't be a constant 100w, it will be whatever the total is of the fans you connect to it.
 
Solution
It will probably depend on whether or not you hook the fans to the motherboard. Hooked to the motherboard, they will be controllable. Hooked straight to the power supply, they will be 100% on at all times. Unless I'm missing something.