Poor performance and 3D Vision corruption in The Witcher 2
A workaround which will fix performance when 3D Vision is disabled has been be provided by NVIDIA through the v275.33 graphics driver and higher versions. Please download the latest display driver from our Software Downloads page at: http://www.nvidia.com/Download/index.aspx?lang=en-us
The developer has now provided a patch v1.35 for the game which should fix performance problems with 3D Vision enabled. The patch is available from Steam by updating your game client or by downloading from http://thewitcher.com/patch/1_35/.