On an ATX board (mine is an ASUS P4C800-E Del) there are 3 connectors for fans, one of which is ordinarily for the CPU fan, but I understand they have a common power feed so any fan be hooked to any one of them. Now, first, is it good or not good to hook fans to the board? I read a post somewhere suggesting it wasn't. Second, does the board control the rpms of the fans based on heat, or ??? Or does it just report the rpms to a monitor if you have one. Trying to get this all learned so I can adequately cool my new system. I know I need more case fans from what info I've dug up recently - but would like to know about this rpm thing. Thanks!!