bigben2k:
I have no problems using 120vac fans in my case. At one time I had 3 ac fans in my case all on fan controllers that I purchased from Edmund Scientifics. Those little (on a 1 ½” x 1 7/16” pcb) controllers worked great.
http://www.scientificsonline.com/ec/...egoryID=323774
They did not include any literature with the controllers. So I don’t know what the wattage limit is.
For several months now I have not been using a case (it is easier to change things around when everything is out on the desk).
So my case fans are not needed.
By now you will have guessed that I like to control the speed (sound) of my fans.