ATI Technologies Nexus GA User Manual page 27

3D Sync
Your Nexus GA graphics accelerator provides superior 3D
performance by performing many tasks in offscreen memory
including graphic rendering. Depending on the 3D scene, the
refresh rate of your computer monitor, and the game or
application, you may notice some slight horizontal flickering or
"tearing". This flicker is caused by the different rates at which
the display performs a complete screen redraw, and when the
Nexus GA moves images located in offscreen memory to the
display buffer. Synchronizing the redraw and the write to the
display buffer provides a flicker-free 3D window.
• On (Synchronize with vertical refresh) - Provides a
flicker-free 3D window. The display is synchronized with
the vertical refresh, so there isn't any flickering or "tearing"
in the 3D window.
• Off (Do not synchronize with vertical refresh) - Provides
a boost in performance, but in some games and applications
it can introduce flickering or "tearing" in the 3D window.
You should experiment with these settings to find the proper
setting for your application.
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