Re: If you have a performance problem, PLEASE read this first
If you are using KDE4, please also note: we are aware of a case of bad interaction between the NVIDIA X driver and the KDE4 OpenGL compositing manager. This may cause performance problems when resizing windows using KDE4; the next release from the 177.x graphics driver series is expected to have improved support for this operation.
Update: interaction between the KDE4 OpenGL compositing manager and the NVIDIA X driver should be improved in the 177.68 NVIDIA BETA graphics driver release. However, we are aware of remaining performance problem affecting text rendering on GeForce 6 and 7 series GPUs, as well as a performance problem affecting some KDE4 applications. We hope to resolve these problems in a future NVIDIA Linux graphics driver release.
Update: the text rendering problems on GeForce 6 and 7 series GPUs should be resolved in the 177.70 BETA graphics driver release; this is also true for the known performance problems affecting some KDE4 applications.