Ok, so just for the record, I did not take any offense, hence my response, I can give as well as take unless it gets personal and then I hit the "ignore" button. It was not my intention to start a flame war, just ask a simple question. Yes, I could have just relied on Google, however I like to get more info than what is posted by who knows on the internet. I had two conflicting sources of info, so i wanted to verify, no need to have a fire even if the system is water cooled, not my idea of fun.

Anyway, I have gone back to what I was doing previously and running 6 of the San Ace fans off the Koolance controller and 3 off a 5v converter board. Not what I wanted to do, but i can't seem to find a decent fan controller for 18 San Ace fans.

Anyway, this thread looks like it should be closed based on the comments. For those that gave advice, thank you, for those that did not, it's ok, no harm, no foul.