iTurbo Software
HIS has gone to great lengths to advance the iTurbo software. The last revision that was tested with the Radeon 7850 needed some work. With this new card it seems like they have fixed some of the issues that were present with the previous release.
You can get Core and Memory frequency control, as well as core voltage control with select cards. If you want to use votlage control, you will need the iTurbo software.
One feature I found really silly last time, the iturbo button is still there. You get a whopping 10mhz overclock by using it.
Fan Controls are made easy with the iTurbo software. You can select a variety of different ways to control fan speed and there is even the option to save Quieter and Cooler fan profiles.
If you were wondering about some of the features on your video card, this software has you covered.