Not sure if this is the right section - sorry if it isn't. Just completed my first build with my son and think I want to add a fan. Currently have two 120mm fans, one in front and one in back. Want to put third on top but MB only has two chassis fan connections. Looks like third will be powered using molex adapter. My question is whether or not it matters which of the three is powered by the molex directly to the PSU? Does it matter or is there a preference?