I have rivatunre v2.08. I followed a guide on how to setup certain fan speeds and at what temperatures they should be operating at. Only thing is, it doesn't happen. It just stays at what ever fan speed I had selected after creating all my fan profiles.
Here's the guide:
http://www.vaguesoft.com/index.php?pageid=rt207
Says it's for v2.07 but also compatible with v2.08.