overlay好像不能開啟pureviedo所有的功能（
），VMR9 Renderless我覺得Zoom Player的Use Exclusive Fullscreen mode with the VMR9 Renderless Video Renderer還不賴
When enabled in combination of VMR9 Renderless mode selected as the Video Renderer, Zoom Player will apply exclusive mode when playing video in Fullscreen. Exclusive mode prevents all other applications from updating the screen and breaks multi-monitor setups (as no other application is allowed to properly update its display). The benefits is a lower CPU requirement and a smoother video image.
NV的確鎖了一些功能
官方比較表 ：http://www.nvidia.com/page/purevideo_support.html