Case fan problem.

[Blake_43]

I have a carbide spec-alpha, and I put in three new fans to creat positive pressure. But when I go to adjust the fan speed with my fan switch on the case it doesn't adjust the speed antmore. Idk if this is cause of my other fans or what? Any help.

 

[Aeacus]

Where did you plug your new fans? Into built-in fan controller or into MoBo fan header(s)? Also, what make and model fans did you buy?