To maximize the cooling effect of the Xbox 360, the XCM 360 Core cooler add-on fan, which can work alone or together with the XCM high speed air cooler, can reduce the temperature of the temperature of the Xbox 360's CPU/GPU by 3-5 degrees Celcius. The XCM high speed air cooler with add on fan is the best cooling system for the Xbox 360.
By comparison, external fans only exhaust heat and are very noisy, the XCM high speed air cooler add on fan quietly expels the internal heat.