3-wire

Hello, I just purchased a Rosewill Cullinan MX - Blue case but I'm not 100% happy with the fan controller. Regarding 3 wire fans with LEDs- Pin 1 - GND Pin 2 - +12VDC or +5VDC Pin 3 - Tach Signal I assume the controller is pretty 'dumb' and does not care about the fan speed. In these...