Capillary action, wicks or just through pressure/vapour-flow.

Regardless, I'm gobsmacked that they bothered with this when a large chuck of the fans on test couldn't even be bothered to use a 4-pin plug for fan control. They've been standard in Intel chipsets for how long now??

In-line resistors that you can plug to your hearts content. I'd be avoiding any of those fans for sheer laziness on the manufacturers.

I'll stick to my watercooling :D