The m15 is a thin-and-light chassis packed with powerful components (often Intel Core i7/i9 or AMD Ryzen 7/9 CPUs). This density creates heat. The tab within the Command Center is where you manage that heat and power.
Never use "Full Speed" unless you are wearing noise-canceling headphones. "Full Speed" sounds like a vacuum cleaner taking off and provides diminishing returns. "Performance" hits the sweet spot of aggressive cooling without destroying your eardrums. alienware m15 command center