Each of my four case fans have three wires attached to them - two for power and one that ends in a small switch box that has L M H to indicate the speed.
So yes, I have to open the case to change fan speeds. The speeds are detailed in the manual. For my 200mm exhaust fan, it goes 400,600,800. For the smaller fans, it's more like 1400-2000
I like leaving the exhaust fan on high...since it's so big and the RPM's are so low, I can barely hear it.
Also I have no idea why the fans could POSSIBLY be telling the tuniq to slow down. The Tuniq is the ONLY fan plugged into the mobo (CPU_FAN). All other fans are connected via molex to the power supply, directly.
Thoughts?
P.S. I am also unclear as to the full actions taken by the OP. I'd like to know more. All I know is that the Tuniq connects using a 3 pin setup - the CPU_FAN area that receives it has 4 pins. The unused pin is for allowing the mainboard to automatically control the speed of the CPU fan. Since I'm not using that pin, I didn't think I'd have any variations.