ATI 9800XT User Guide - Page 30

26 OpenGL® Compatibility Settings Force Z-buffer depth Triple Buffering OpenGL® hardware acceleration Defaults button Explicitly set the Z-Buffer depth. Most applications will work best when Disabled is selected Improves the frame rate of games when Wait for Vertical Sync is enabled in Custom Settings. Enabling Triple Buffering may decrease application performance as there will be less frame-buffer memory available. If there is insufficient memory available to support this feature it will be automatically disabled. It is recommended that this feature remain disabled. This feature should only be disabled if you are experiencing serious rendering problems. Disabling this feature will significantly decrease OpenGL® performance. Resets to the dialog's default values.