For a CPU, or processor, to maintain a safe operating temperature, it needs a CPU fan. When properly installed, a CPU fan stays in constant contact with the CPU's metal plate so all the heat generated ...
Cooling is super important. The cooler you can keep your tech—a battery, machine part, computer component—the more energy efficient it is. This means you get more power for the amount of power spent.
What do you get when you attach 15 fans to your gaming PC's side panels? WAY lower temperatures, of course.