I7Baby is right in the regard that the radiator fans do plug into the CPU header do to the fact that radiator fans are usually PWM fans, which require a 4 pin connection which opens these fans up for power variation to adjust the fan rpm, compared to fans that run off the standard 3 pin head which causes them to run at full speed 24/7. Also, if you have an All in One cooler like the Corsair H series, don't plug the pump into the fan controller despite it having a three pin connector, that is just asking for trouble, especially if its a digital controller like the Sentry 2 and the settings on in inadvertently get reset to factory settings.