[mythtv-users] Nvidia 8174+OpenGLVSync = High CPU

Greg Estabrooks greg at phaze.org
Fri Dec 9 10:17:35 EST 2005

 Just a friendly note of warning to all of the NVIDIA users out there
who have upgraded to use version 8174 of the NVIDIA driver that you could
be using a lot more CPU than with earlier driver versions.

 It has been reported by a few people (myself included) that
using OpenGL Vsync with 8174 uses a lot more CPU than previous. Disabling
OGL Vsync or reverting to a previous driver lowers the usage back to

 So if you are suddenly seeing some skipping video or other
cpu issues and you recently updated your video driver you might want to check
it out.

With 7676 my cpu usage was(on an XP2500+) :

        With OGLVS 
                Playback :      12%
                  Paused :      0%

        Without OGLVS
                Playback :      13%
                  Paused :       0%

But with 8174 I had:

	With OGLVS 
		Playback :	80%
		  Paused :	30%   (That's right, 30% when paused)

	Without OGLVS
		Playback :	13%
		  Paused :	 0%

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