(I didn't want to post it in the 3D Coat BETA thread where the discussion took place, so I created a new topic)
Guys, I think something was improved in one of the latest Kepler drivers, because since I installed version 340.52 a few days ago, I notice a major boost in viewport's speed when working in wireframe mode inside 3D Coat. I made some tests with 30 million tris mesh and I get 15fps when rotating the camera, which is night-and-day difference to what I had before (1-2 fps or even less). On a 4.3 million mesh I get 103 fps. And again, all this on a Kepler (GTX660Ti) and in wireframe mode!