yes, according to Asus Fan Expert is included with that board, so maybe you just need to install it from the disk?
http://usa.asus.com/Motherboards/Intel_Socket_1155/P8B75MCSM/
Thanks for the answers so far, I will have to wait till tomorrow to do it. And yes I meant like changing the RPM so that at idle it will spin at X% and load at X% and will scale in between those.
Here's how I have mine setup in Fan Xpert. It's extremely aggressive (I don't mind the noise so much, even with 2 fans in push/pull), but you get the point.