Meh, I have a general dislike for most manufacture specific tweaking tools.
The same (or better) functionality can be found in the control panel or in Rivatuner.
IMO, smart cool will probably run your fan to slow and allow your card to heat up to much just for the sake of noise.
Your temps look great, as you should expect from the fans running at full tilt.
Try going into Rivatuner and taking the fan off Auto and setting it to, say 50%.
Once you hit apply, the noise should immediately drop off.
If this works, use GPUz to track your temps and run something to load the card up.
If your temps get to high, raise it a bit and test it again.