You can use Afterburner and Kombuster, or you can use EVGA's Precision as hk mentioned. Afterburner allows for custom auto-fan settings, whereas Precision does not.
Using Afterburner to set an overclock and/or fan profile has the advantage for you to run Kombuster (MSI's version of Furmark which is included with the Afterburner download) to test the configuration for stability and tempreture.