[ubuntu] Slow performace on Unity 3D (Nvidia)

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http://ubuntuforums.org – I have an Nvidia card and because of all the problems with the normal driver in the repos, I installed the 302.17 driver from the Ubuntu-X ppa. However, Unity 3D seems to be a bit slow: The launcher takes a relatively long time to open (about a second or two) Moving windows about increases CPU usage quite a bit. Glxgears provides good frame rates (59 - 60) but the movement of the gears seems rough.. (it looks much smoother when I run glxgears on from Unity 2D) What could be the problem? This is what "system test" showed. graphics/compiz_checkPASSEDOpenGL vendor string: NVID (Hardware)