> Setting the environment variable __GL_SYNC_TO_VBLANK to a non-zero value > will force glXSwapBuffers to sync to your monitor's vertical refresh rate > (perform a swap only during the vertical blanking period) on GeForce or > newer hardware (ie: everything but TNT/TNT2 products). > > For windows people, there is probably something similar in the windows > display properties.
On the display settings dialog for my GeForce2 MX/400 there is a checkbox for "vertical sync on". Also, 3DMark reports that software can select to turn OFF VSync on my machine. If that's the same thing as what you are talking about, it appears that it is on by default at least on my system. Jon
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